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215653-81-9

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215653-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 215653-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,5,6,5 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 215653-81:
(8*2)+(7*1)+(6*5)+(5*6)+(4*5)+(3*3)+(2*8)+(1*1)=129
129 % 10 = 9
So 215653-81-9 is a valid CAS Registry Number.

215653-81-9Relevant articles and documents

Synthesis of 13C labelled daidzein and formononetin.

Whalley,Bond,Botting

, p. 2569 - 2572 (1998)

Efficient methods are described for the synthesis of daidzein and formononetin labelled with a single 13C atom at the 4-position, to prepare material for metabolic studies.

Synthesis of [4-13C]-isoflavonoid phytoestrogens

Whalley, Jacqueline L.,Oldfield, Mark F.,Botting, Nigel P.

, p. 455 - 460 (2007/10/03)

Efficient syntheses are described for 13C-labelled derivatives of the isoflavonoid phytoestrogens, genistein, biochanin A, daidzein and formononetin, for use in metabolic studies. The synthetic procedure employs 13C-labelled cyanide as the source of the label to produce the isoflavones with a single 13C atom at the C-4 position. (C) 2000 Elsevier Science Ltd.

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