127557-46-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 127557-46-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,5,5 and 7 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 127557-46:
(8*1)+(7*2)+(6*7)+(5*5)+(4*5)+(3*7)+(2*4)+(1*6)=144
144 % 10 = 4
So 127557-46-4 is a valid CAS Registry Number.
127557-46-4Relevant articles and documents
REGIOSELECTIVE SYNTHESIS OF RING A POLYMETHYLATED STEROIDS IN THE ANDROSTANE SERIES
Kuenzer, Hermann,Sauer, Gerhard,Wiechert, Rudolf
, p. 6409 - 6426 (2007/10/02)
Properly protected derivatives 14 and 20 of the common precursor 17β-hydroxy-1-methyl-5α-androst-1-en-3-one (13) have been transformed in a regioselective manner into highly methylated androsta-1,4-diene-3,17-dione derivatives 6-8.Access to the manifold o
