156896-66-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156896-66-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,8,9 and 6 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 156896-66:
(8*1)+(7*5)+(6*6)+(5*8)+(4*9)+(3*6)+(2*6)+(1*6)=191
191 % 10 = 1
So 156896-66-1 is a valid CAS Registry Number.
156896-66-1Relevant articles and documents
Photochemical synthesis of C/D-ring synthons of vitamin D
Dauben, William G.,Ollmann Jr., Richard R.,Wu, Shung C.
, p. 2149 - 2152 (2007/10/02)
Beginning with a steroid-5-ene, C/D-ring synthons of vitamin D are readily prepared via ozonization followed by a Norrish II photoelimination reaction.