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epiafzelechin-(4β-8,2β-O-7)-ent-afzelechin tetramethyl ether is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

143901-40-0

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143901-40-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143901-40-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,0 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143901-40:
(8*1)+(7*4)+(6*3)+(5*9)+(4*0)+(3*1)+(2*4)+(1*0)=110
110 % 10 = 0
So 143901-40-0 is a valid CAS Registry Number.

143901-40-0Relevant academic research and scientific papers

EPIAFZELECHIN-(4β->8,2β->O->7)-ENT-AFZELECHIN FROM CASSIPOUREA GERRARDII

Drewes, Siegfried E.,Taylor, Craig W.,Cunningham, Anthony B.,Ferreira, Daneel,Steenkamp, Jacobus A.,Mouton, C. Hendrick L.

, p. 2491 - 2494 (1992)

A new A-type proanthocyanidin has been isolated from the bark of Cassipourea gerrardii.Its structure has been established from spectroscopic studies as epiafzelechin-(4β->8,2β->O->7)-ent-afzelechin. 1H-NMR analysis of R-(+)- and S-(-)-α-methoxy-α-trifluoromethylphenylacetic acid (MTPA) esters of the title compound permits assessment of the absolute stereochemistry at both C-3(C) and C-3(F). Key Word Index - Cassipourea gerrardii; Rhizophoraceae; A-type proanthocyanidin; flavan-3-ol.

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