156969-61-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156969-61-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,6 and 9 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156969-61:
(8*1)+(7*5)+(6*6)+(5*9)+(4*6)+(3*9)+(2*6)+(1*1)=188
188 % 10 = 8
So 156969-61-8 is a valid CAS Registry Number.
156969-61-8Relevant articles and documents
Regioselective Synthesis of Camptothecin
Rao, A. V. Rama,Yadav, J. S.,Valluri, Muralikrishna
, p. 3613 - 3616 (1994)
A convergent synthesis of (+/-)camtothecin is described.