The CAS Registry Mumber 97957-01-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,9,5 and 7 respectively; the second part has 2 digits, 0 and 1 respectively. Calculate Digit Verification of CAS Registry Number 97957-01: (7*9)+(6*7)+(5*9)+(4*5)+(3*7)+(2*0)+(1*1)=192 192 % 10 = 2 So 97957-01-2 is a valid CAS Registry Number.
A convenient method for the preparation of 16,16-bis[hydroxymethyl]-17-hydroxy-steroids and 16,16-bis[hydroxymethyl]-17-oxo-steroids
Schneider,Wolfling,Hackler,et al.
, p. 194 - 197 (2007/10/02)
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