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3,8-Dihydroxy-1,4,6,9-tetramethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7-carboxylic acid methyl ester is a complex organic compound with the molecular formula C18H18O8. It is a derivative of dibenzo[b,e][1,4]dioxepin, a tricyclic aromatic compound, featuring a methyl ester group attached to the carboxylic acid functionality. The molecule contains two hydroxyl groups at the 3rd and 8th positions, four methyl groups at the 1st, 4th, 6th, and 9th positions, and an oxo group at the 11th position. This chemical is characterized by its unique structure and functional groups, which may contribute to specific chemical properties and potential applications in various fields, such as pharmaceuticals or materials science.

4665-03-6

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4665-03-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4665-03-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,6 and 5 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4665-03:
(6*4)+(5*6)+(4*6)+(3*5)+(2*0)+(1*3)=96
96 % 10 = 6
So 4665-03-6 is a valid CAS Registry Number.

4665-03-6Downstream Products

4665-03-6Relevant academic research and scientific papers

Assignment of 1H NMR Spectra of Depsides, Depsidones, Depsones and Dibenzofurans from Lichens by NOE Difference Spectroscopy

Jakupovic, Jasmin,Huneck, Siegfried

, p. 1117 - 1123 (2007/10/02)

The 1H NMR spectra of the following lichen substances have been correlated by NOE difference spectroscopy: atranorin, barbatic acid, diffractaic acid, nephroarctin, perlatolic acid, planaic acid methyl ester, pseudocyphellarin A, sphaerophorin (depsides), hypoprotocetraric acid, lobaric acid, pannarin, physodalic acid, psoromic acid, stictic acid (depsidones), picrolichenic acid (depsone), di-O-methyl-pannaric acid dimethylester, pannaric acid, porphyrilic acid, schizopeltic acid, strepsilin, and usnic acid (dibenzofurans). - Keywords: Lichens, Depsides, Depsidones, Depsones, Dibenzofurans, 1H NOE Difference Spectroscopy

Depsidone Synthesis. Part 19. Some β-Orcinol Depsidones

Sala, Tony,Sargent, Melvyn V.

, p. 877 - 882 (2007/10/02)

The synthesis of the lichen depsidones 3,8-dihydroxy-1,4,6,9-tetramethyl-11-oxo-11H-dibenzo-dioxepin-7-carboxylic acid (hypoprotocetraric acid) (4), 8-hydroxy-3-methoxy-1,4,6,9-tetramethyl-11-oxo-11H-dibenzodioxepin-7-carboxylic acid (

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