641-79-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641-79-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,4 and 1 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 641-79:
(5*6)+(4*4)+(3*1)+(2*7)+(1*9)=72
72 % 10 = 2
So 641-79-2 is a valid CAS Registry Number.
InChI:InChI=1/C21H34O4/c1-12(22)21(25)9-6-16-14-11-18(24)17-10-13(23)4-7-19(17,2)15(14)5-8-20(16,21)3/h13-18,23-25H,4-11H2,1-3H3/t13?,14-,15+,16+,17?,18?,19-,20+,21+/m1/s1
641-79-2Relevant articles and documents
A synthesis of 3alpha,6alpha,17alpha-trihydroxy-5beta-pregnan-20-one (triolone) from 3alpha,6alpha-dihydroxy-5beta-pregnan-20-one (diolone).
Mazurkiewicz, Witold
, p. 281 - 284 (2007/10/03)
An optimization of synthesis of 3alpha,6alpha,17alpha-trihydroxy-5beta-pregnan-20-one from 3alpha,6alpha-dihydroxy-5beta-pregnan-20-one by subsequent acetylenolization, epoxidation, and ring opening reactions has been described. Epoxide hydrolysis at different temperatures (room and at boiling) has also been investigated.