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.