Category: 123-11-5

Safety of 4-Methoxybenzaldehyde. Authors Narulkar, DD; Ansari, A; Vardhaman, AK; Harmalkar, SS; Lingamallu, G; Dhavale, VM; Sankaralingam, M; Das, S; Kumar, P; Dhuri, SN in ROYAL SOC CHEMISTRY published article about in [Narulkar, Dattaprasad D.; Harmalkar, Sarvesh S.; Dhuri, Sunder N.] Goa Univ, Sch Chem Sci, Taleigao 103206, Goa, India; [Narulkar, Dattaprasad D.] Dnyanprassarak Mandals Coll & Res Ctr, Dept Chem, Assagao 403507, Goa, India; [Ansari, Azaj] Cent Univ Haryana, Dept Chem, Mahendergarh 123031, Haryana, India; [Vardhaman, Anil Kumar; Lingamallu, Giribabu] CSIR, Indian Inst Chem Technol, Polymers & Funct Mat Div, Uppal Rd, Hyderabad 500007, India; [Dhavale, Vishal M.] CSIR, Cent Electrochem Res Inst, CSIR Madras Complex, Chennai 600113, Tamil Nadu, India; [Sankaralingam, Muniyandi] Natl Inst Technol Calicut, Dept Chem, Bioinspired & Biomimet Inorgan Chem Lab, Kozhikode 673601, Kerala, India; [Das, Sandip; Kumar, Pankaj] Indian Inst Sci Educ & Res IISER, Tirupati 673601, Andhra Pradesh, India in 2021, Cited 70. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5

A mononuclear manganese(iii)-peroxo complex [Mn-III(N3Py2)(O-2)](+) (1a) bearing a non-heme N,N ‘-dimethyl-N-(2-(methyl(pyridin-2-ylmethyl)amino)ethyl)-N ‘-(pyridin-2-ylmethyl)ethane-1,2-diamine (N3Py2) ligand was synthesized by the reaction of [Mn(N3Py2)(H2O)](ClO4)(2) (1) with hydrogen peroxide and triethylamine in CH3CN at 25 degrees C. The reactivity of 1a in aldehyde deformylation using 2-phenyl propionaldehyde (2-PPA) was studied and the reaction kinetics was monitored by UV-visible spectroscopy. A kinetic isotope effect (KIE) = 1.7 was obtained in the reaction of 1a with 2-PPA and alpha-[D-1]-PPA, suggesting nucleophilic character of 1a. The activation parameters Delta H-double dagger and Delta S-double dagger were determined using the Eyring plot while E-a was obtained from the Arrhenius equation by performing the reaction between 288 and 303 K. Hammett constants (sigma(p)) of para-substituted benzaldehydes p-X-Ph-CHO (X = Cl, F, H, and Me) were linear with a slope (rho) = 3.0. Computational study suggested that the side-on structure of 1a is more favored over the end-on structure and facilitates the reactivity of 1a.

About 4-Methoxybenzaldehyde, If you have any questions, you can contact Narulkar, DD; Ansari, A; Vardhaman, AK; Harmalkar, SS; Lingamallu, G; Dhavale, VM; Sankaralingam, M; Das, S; Kumar, P; Dhuri, SN or concate me.. Safety of 4-Methoxybenzaldehyde

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Wu, CQ; Bao, ZC; Dou, BW; Wang, JB in WILEY-V C H VERLAG GMBH published article about B-ALKYLCATECHOLBORANES; BORONIC ESTERS; PHOTOREDOX; ACTIVATION; REACTIVITY; SECONDARY; KETONES; ACCESS in [Wu, Chaoqiang; Bao, Zhicheng; Dou, Bowen; Wang, Jianbo] Peking Univ, Beijing Natl Lab Mol Sci BNLMS, Key Lab Bioorgan Chem & Mol Engn, Minist Educ,Coll Chem, Beijing 100871, Peoples R China in 2021.0, Cited 56.0. Computed Properties of C8H8O2. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5

A transition-metal-free method for the alkylation of gem-diborylalkanes with alpha,beta-unsaturated ketones has been developed. It is demonstrated that the alpha-boryl radicals can be generated efficiently from gem-diborylalkanes with the aid of catechol and oxidants. The alpha-boryl radicals formed through such process can be engaged in conjugate addition reaction with alpha,beta-unsaturated ketones. This transformation is a straightforward method for the synthesis of gamma-borylketones.

About 4-Methoxybenzaldehyde, If you have any questions, you can contact Wu, CQ; Bao, ZC; Dou, BW; Wang, JB or concate me.. Computed Properties of C8H8O2

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Manzoor, S; Prajapati, SK; Majumdar, S; Raza, MK; Gabr, MT; Kumar, S; Pal, K; Rashid, H; Kumar, S; Krishnamurthy, S; Hoda, N in ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER published article about in [Manzoor, Shoaib; Pal, Kavita; Rashid, Haroon; Hoda, Nasimul] Jamia Millia Islamia, Drug Design & Synth Lab, Dept Chem, New Delhi 110025, India; [Prajapati, Santosh Kumar; Majumdar, Shreyasi; Krishnamurthy, Sairam] Banaras Hindu Univ, Dept Pharmaceut Engn & Technol, Neurotherapeut Lab, Indian Inst Technol, Varanasi 221005, Uttar Pradesh, India; [Raza, Md Kausar] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India; [Gabr, Moustafa T.] Stanford Univ, Dept Radiol, Stanford, CA 94305 USA; [Kumar, Shivani; Kumar, Suresh] Guru Gobind Singh Indraprastha Univ Dwarka, Univ Sch Biotechnol, Sect 16C, New Delhi 110078, India in 2021, Cited 77. Category: indole-building-block. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5

Alzheimer’s disease (AD) is multifactorial, progressive neurodegeneration with impaired behavioural and cognitive functions. The multitarget-directed ligand (MTDL) strategies are promising paradigm in drug development, potentially leading to new possible therapy options for complex AD. Herein, a series of novel MTDLs phenylsulfonyl-pyrimidine carboxylate (BS-1 to BS-24) derivatives were designed and synthesized for AD treatment. All the synthesized compounds were validated by (HNMR)-H-1, (CNMR)-C-13, HRMS, and BS-19 were structurally validated by X-Ray single diffraction analysis. To evaluate the plausible binding affinity of designed compounds, molecular docking study was performed, and the result revealed their significant interaction with active sites of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). The synthesized compounds displayed moderate to excellent in vitro enzyme inhibitory activity against AChE and BuChE at nanomolar (nM) concentration. Among 24 compounds (BS-1 to BS-24), the optimal compounds (BS-10 and BS-22) displayed potential inhibition against AChE; IC50 = 47.33 +/- 0.02 nM and 51.36 +/- 0.04 nM and moderate inhibition against BuChE; IC50 = 159.43 +/- 0.72 nM and 153.3 +/- 0.74 nM respectively. In the enzyme kinetics study, the compound BS-10 displayed non-competitive inhibition of AChE with Ki = 8 nM. Respective compounds BS-10 and BS-22 inhibited AChE-induced A beta(1- 42) aggregation in thioflavin T-assay at 10 mu M and 20 mu M, but BS-10 at 10 mu M and 20 mu M concentrations are found more potent than BS-22. In addition, the aggregation properties were determined by the dynamic light scattering (DLS) and was found that BS-10 and BS-22 could significantly inhibit self-induced as well as AChE-induced A beta(1- 42) aggregation. The effect of compounds (BS-10 and BS-22) on the viability of MC65 neuroblastoma cells and their capability to cross the blood-brain barrier (BBB) in PAMPA-BBB were further studied. Further, in silico approach was applied to analyze physicochemical and pharmacokinetics properties of the designed compounds via the SwissADME and PreADMET server. Hence, the novel phenylsulfonyl-pyrimidine carboxylate derivatives can act as promising leads in the development of AChE inhibitors and A beta disaggregator for the treatment of AD. (C) 2021 Elsevier Masson SAS. All rights reserved.

Category: indole-building-block. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Manzoor, S; Prajapati, SK; Majumdar, S; Raza, MK; Gabr, MT; Kumar, S; Pal, K; Rashid, H; Kumar, S; Krishnamurthy, S; Hoda, N or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Safety of 4-Methoxybenzaldehyde. Recently I am researching about CATALYST; GREEN; NANOCOMPOSITE; NANOPARTICLES; EFFICIENT; DESIGN; SHELL, Saw an article supported by the Islamic Azad University of Yazd. Published in SPRINGER in NEW YORK ,Authors: Shafe-Mehrabadi, SR; Sadeghi, B; Mosslemin, MH; Hashemian, S. The CAS is 123-11-5. Through research, I have a further understanding and discovery of 4-Methoxybenzaldehyde

According to the Food and Agriculture Organization (FAO), Iran is the largest pistachio (Pistacia vera) producer in the world. Nevertheless, pistachio by-products (PBs) contain a high level of phenolic and cellulose compounds, it can be used as a substrate for the preparation of solid acid catalysts. In this work, the novel pistachio hull-OxTiCl4 (-) (x) catalyst was synthesized via preparing pistachio hull, product of Kerman, as a support followed by treatment with titanium tetrachloride (TiCl4) and identified by Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FE-SEM), X-ray diffraction spectroscopy (EDX), thermogravimetric analysis (TG), Brunauer-Emmett-Teller (BET) and X-ray powder diffraction (XRD). The size of the nano-pistachio hull-OxTiCl4 (-) (x) nanocatalyst was shown by a scanning electron microscope below 100 nm. The catalytic activity of the solid acid catalyst has been successfully examined in a one-pot, three-component condensation reaction of aromatic aldehydes, dimedone and kojic acid in refluxing ethanol to furnish dihydropyrano[3,2-b]chromendione derivatives. Consequently, pyran annulated heterocycles were obtained. The proposed approach has some advantages as excellent yields, mild reaction conditions, short reaction times, use of agricultural waste and eco-friendly.

Safety of 4-Methoxybenzaldehyde. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Shafe-Mehrabadi, SR; Sadeghi, B; Mosslemin, MH; Hashemian, S or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

In 2021 POLYCYCL AROMAT COMP published article about ONE-POT SYNTHESIS; CONVENIENT SYNTHESIS; PYRAN DERIVATIVES; HETEROPOLY ACIDS; NIFE2O4; LIQUID in [Ataie, Farideh; Davoodnia, Abolghasem] Islamic Azad Univ, Mashhad Branch, Dept Chem, Mashhad 9175687119, Razavi Khorasan, Iran; [Khojastehnezhad, Amir] Ferdowsi Univ Mashhad, Fac Sci, Dept Chem, Mashhad 917751436, Razavi Khorasan, Iran in 2021, Cited 46. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. Recommanded Product: 123-11-5

In this study, a graphene oxide (GO) functionalized organic-inorganic hybrid was prepared by covalently immobilization of organic (3-aminopropyltrimethoxysilane) and inorganic (H3PMo12O40) groups on the basal plane of GO. Structure of catalyst was characterized with different analysis such as FT-IR, SEM, TEM, EDS, WDX, XRD, and TGA. All analyses approve the successful covalently immobilization of organic and inorganic parts on the GO. The activity of catalyst has been tested for the synthesis of tetrahydrobenzo[b]pyran derivatives under solvent-free condition in short reaction time and good to excellent yields. [GRAPHICS] .

About 4-Methoxybenzaldehyde, If you have any questions, you can contact Ataie, F; Davoodnia, A; Khojastehnezhad, A or concate me.. Recommanded Product: 123-11-5

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Recommanded Product: 4-Methoxybenzaldehyde. Merimi, I; Aslam, R; Hammouti, B; Szumiata, T; Lgaz, H; Chung, IM in [Merimi, Imane; Hammouti, Belkheir] Mohamed First Univ, Lab Appl Analyt Chem Mat & Environm L2ACME, Fac Sci, BP 717, Oujda 60000, Morocco; [Aslam, Ruby] Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Corros Res Lab, Aligarh 202002, Uttar Pradesh, India; [Szumiata, Tadeusz] Univ Technol & Humanities Radom, Dept Phys, Fac Mech Engn, Stasieckiego 54 Str, PL-26600 Radom, Poland; [Lgaz, Hassane; Chung, Ill -Min] Konkuk Univ, Dept Crop Sci, Coll Sanghur Life Sci, Seoul 05029, South Korea published Adsorption and inhibition mechanism of (Z)-4-((4-methoxybenzylidene)amino)-5-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione on carbon steel corrosion in HCl: Experimental and theoretical insights in 2021, Cited 59. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5.

Although the number of reported corrosion inhibitors has increased steeply in recent years, global corrosion damages raised the need for highly effective, new promising compounds for corrosion protection of metals and their alloys. Herein, chemical and electrochemical testing methods like weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) measurements were applied to evaluate the inhibition performance and adsorption mechanism of (Z)-4-((4-methoxybenzylidene)amino)-5-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione (2C) against carbon steel (CS) corrosion 1.0 M HCl. Together, electrochemical results and morphological evidence from scanning electron microscope (SEM) demonstrated that, in the presence of 2C, the inhibition efficiency reaches a maximum of 86% at 10(-3), forming a compact protective layer on CS surface. On the other hand, corrosion inhibition decreases a little with the rise of the temperature. The investigated compound was classified as a mixed class inhibitor, affecting both anodic and cathodic reactions, while its adsorption followed the Langmuir adsorption isotherm. Molecular dynamics (MD) simulations and quantum chemical calculations were used to give further insights into the inhibiting action of 2C and to explain its mechanism of action. Scanning electron microscopy (SEM) reveals an enhanced surface morphology of carbon steel after the addition of the tested compound to the electrolyte. (C) 2021 Elsevier B.V. All rights reserved.

Recommanded Product: 4-Methoxybenzaldehyde. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Merimi, I; Aslam, R; Hammouti, B; Szumiata, T; Lgaz, H; Chung, IM or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

I found the field of Chemistry; Physics very interesting. Saw the article Catalyst- and acid-free Markovnikov hydration of alkynes in a sustainable H2O/ethyl lactate system published in 2021. Product Details of 123-11-5, Reprint Addresses Dandia, A; Parewa, V (corresponding author), Univ Rajasthan, Ctr Adv Studies, Dept Chem, Jaipur, Rajasthan, India.. The CAS is 123-11-5. Through research, I have a further understanding and discovery of 4-Methoxybenzaldehyde

An efficient and sustainable protocol for the hydration of alkynes has been developed under metal/acid/catalyst/ ligand-free conditions in a water/ethyl lactate mixture. The hydrogen-bond network in the ethyl lactate and water mixture plays a crucial and decisive role in activating the alkynes for hydration to afford the corresponding methyl ketones. This strategy gives the Markovnikov (ketone) addition product selectively over other possible products. The essential role of hydrogen bonding has been confirmed by experimental and theoretical techniques. A probable mechanism has been suggested by various control tests. The efficacy of the method has been further explored for the competent production of value-added alpha,beta-unsaturated carbonyl compounds through the reaction of aldehydes with alkynes as ketonic surrogates. The environmentally benign hydration method takes place under mild conditions, has broad functional-group compatibility, and uses the ethyl lactate/water (1:3) medium as a green alternative in the absence of any hazardous, harmful, or expensive substances. (C) 2021 Elsevier B.V. All rights reserved.

Product Details of 123-11-5. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Dandia, A; Saini, P; Chithra, MJ; Vennapusa, SR; Parewa, V or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Green Approach for Preparation of New Hybrids of 5-Substituted-1H-Tetrazoles Using Novel Recyclable Nanocatalyst based on Copper(II) Anchored onto Glucosamine Grafted to Fe3O4@SiO2 WOS:000625488000005 published article about CRYSTAL-STRUCTURE; DOCKING in [Eslahi, Hassan; Reza Sardarian, Ali] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 7194684795, Iran; [Esmaeilpour, Mohsen] Niroo Res Inst, Chem & Proc Engn Dept, Tehran 1468617151, Iran in 2021, Cited 82. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. HPLC of Formula: C8H8O2

The novel copper(II) ions decorated Fe3O4@SiO2 composite magnetic spheres were synthesized by grafting copper(II) ions onto glucosamine modified Fe3O4@SiO2 NPs. The magnetic Fe3O4@SiO2-TCT-GA-Cu(II) catalyst were characterized by varies physicochemical techniques such as FT-IR, FE-SEM, TEM, DLS, XRD, EDX, VSM, TGA, VSM, ICP, and UV-Vis. The catalytic performance of this novel catalyst was studied in the green preparation of 5-substituted 1H-tetrazole based hybrids via three-component and one-pot reaction of sodium azide, hydroxylamine hydrochloride, and various aldehydes in water and ethylene glycol, as a green solvent mixture. This green protocol provides significant advantages such as non-vigorous conditions, short reaction times, outstanding yield of desired tetrazoles, minimizing of chemical waste, wide-ranging substrate, quick and efficient work-up procedure and using environmentally benign, durable, cost effective, magnetically separable, reusable nanocatalyst.

HPLC of Formula: C8H8O2. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Eslahi, H; Sardarian, AR; Esmaeilpour, M or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

I found the field of Chemistry very interesting. Saw the article Novel uric acid-based nano organocatalyst with phosphorous acid tags: Application for synthesis of new biologically-interest pyridines with indole moieties via a cooperative vinylogous anomeric based oxidation published in 2021.0. HPLC of Formula: C8H8O2, Reprint Addresses Zarei, M; Zolfigol, MA (corresponding author), Bu Ali Sina Univ, Fac Chem, Dept Organ Chem, POB 6517838683, Hamadan, Hamadan, Iran.; Shi, H (corresponding author), Shanxi Univ, Sch Chem & Chem Engn, Inst Mol Sci, Taiyuan 030006, Peoples R China.. The CAS is 123-11-5. Through research, I have a further understanding and discovery of 4-Methoxybenzaldehyde

In this study, we have designed, synthesized and full characterized a novel biological based acidic nano organocatalyst via condensations reaction of uric acid and phosphorous acid. The obtained compound was named theacrine tetrakis(phosphonic acid) (TTPA) and prepared under refluxing ethanol. This new nano organocatalyst was applied as an efficient and recyclable catalyst for the preparation of novel pyridines with indole moieties via a cooperative vinylogous anomeric based oxidation with good to excellent yields.

HPLC of Formula: C8H8O2. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Kalhor, S; Zarei, M; Sepehrmansourie, H; Zolfigol, MA; Shi, H; Wang, JP; Arjomandi, J; Hasani, M; Schirhagl, R or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Formula: C8H8O2. In 2021 CATAL SCI TECHNOL published article about PONNDORF-VERLEY REDUCTION; EPOXIDATION CATALYSTS; STRUCTURAL-CHARACTERIZATION; TRANSFER HYDROGENATION; OLEFIN POLYMERIZATION; QUINONE METHIDES; ACTIVE-SITES; BETA ZEOLITE; EFFICIENT; ETHERIFICATION in [Garg, Shipra; Unruh, Daniel K.; Krempner, Clemens] Texas Tech Univ, Dept Chem & Biochem, Mem Dr & Boston, Lubbock, TX 79409 USA in 2021, Cited 53. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5.

The polyhedral oligosilsesquioxane complexes, {[(isobutyl)(7)Si7O12]ZrOPri center dot(HOPri)}(2) (I), {[(cyclohexyl)(7)Si7O12]ZrOPri center dot(HOPri)}(2) (II), {[(isobutyl)(7)Si7O12]HfOPri center dot(HOPri)}(2) (III) and {[(cyclohexyl)(7)Si7O12]HfOPri center dot(HOPri)}(2) (IV), were synthesized in good yields from the reactions of M(OPri)(4) (M = Zr, Hf) with R-POSS(OH)(3) (R = isobutyl, cyclohexyl), resp. I-IV were characterized by H-1, C-13 and Si-29 NMR spectroscopy and their dimeric solid-state structures were confirmed by X-ray analysis. I-IV catalyze the reductive etherification of 2-hydroxy- and 4-hydroxy and 2-methoxy and 4-methoxybenzaldehyde and vanillin to their respective isopropyl ethers in isopropanol as a green solvent and reagent. I-IV are durable and robust homogeneous catalysts operating at temperatures of 100-160 degrees C for days without significant loss of catalytic activity. Likewise, I-IV selectively catalyze the conversion of 5-hydroxymethylfurfural (HMF) into 2,5-bis(isopropoxymethyl)furane (BPMF), a potentially high-performance fuel additive. Similar results were achieved by using a combination of M(OPri)(4) and ligand R-POSS(OH)(3) as a catalyst system demonstrating the potential of this in situ approach for applications in biomass transformations. A tentative reaction mechanism for the reductive etherification of aldehydes catalysed by I-IV is proposed.

Formula: C8H8O2. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Garg, S; Unruh, DK; Krempner, C or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles