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138380-77-5

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138380-77-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138380-77-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,3,8 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 138380-77:
(8*1)+(7*3)+(6*8)+(5*3)+(4*8)+(3*0)+(2*7)+(1*7)=145
145 % 10 = 5
So 138380-77-5 is a valid CAS Registry Number.

138380-77-5Relevant articles and documents

Asymmetric Synthesis of (-)-Neopodophyllotoxin

Charlton, James L.,Koh, Kevin

, p. 1514 - 1516 (2007/10/02)

A five-step asymmetric synthesis of neopodophyllotoxin in 18percent overall yield and optical purity >97percent, starting from 6-(3,4,5-trimethoxybenzyl)piperonal (6) and the fumarate of (S)-methyl mandelate (8), is described.

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