131943-93-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131943-93-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,9,4 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131943-93:
(8*1)+(7*3)+(6*1)+(5*9)+(4*4)+(3*3)+(2*9)+(1*3)=126
126 % 10 = 6
So 131943-93-6 is a valid CAS Registry Number.
131943-93-6Relevant articles and documents
Synthesis of 4- and 16α-hydroxylated equine estrogens
Ikegawa, Shigeo,Kurosawa, Takao,Tohma, Masahiko
, p. 250 - 255 (2007/10/02)
4-Hydroxyequilin, 4-hydroxyequilenin, and 16α-hydroxyequilenin were synthesized as authentic specimens for the metabolic studies of equine estrogens.The synthetic route leading to the 4-hydroxylated compounds was started from o-vanillin, which was transfo
