153261-59-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 153261-59-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,2,6 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 153261-59:
(8*1)+(7*5)+(6*3)+(5*2)+(4*6)+(3*1)+(2*5)+(1*9)=117
117 % 10 = 7
So 153261-59-7 is a valid CAS Registry Number.
153261-59-7Relevant articles and documents
SYNTHESIS OF 17&α-HYDROXY STEROIDS: B-NOREPITESTOSTERONE
Kasal, Alexander
, p. 2202 - 2210 (2007/10/02)
The key intermediate VI was prepared by two ways: by B ring contraction of an androst-5-ene-3β,17α-diol derivative I and by configurational inversion of the 17β-hydroxy group in a N-norandrost-5-ene-3β,17β-diol derivative XII.B-Norepitestosterone (IX) and