133283-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133283-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,2,8 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 133283-83:
(8*1)+(7*3)+(6*3)+(5*2)+(4*8)+(3*3)+(2*8)+(1*3)=117
117 % 10 = 7
So 133283-83-7 is a valid CAS Registry Number.
133283-83-7Relevant articles and documents
Radical cyclization strategies to terpenoids; syntheses of (±)-β-cuparenone, (±)-laurene and epilaurenes
Srikrishna,Sundarababu
, p. 481 - 496 (2007/10/19)
Radical cyclization of the bromide 8, obtained in 5 steps from the ketone 9, furnished exclusively 14 via 6-endo frig cyclization with out any observable amount of 5-exo trig product 1. 5-Exo dig radical cyclization of the bromo acetate 23, prepared from