131533-60-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131533-60-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,3 and 3 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 131533-60:
(8*1)+(7*3)+(6*1)+(5*5)+(4*3)+(3*3)+(2*6)+(1*0)=93
93 % 10 = 3
So 131533-60-3 is a valid CAS Registry Number.
131533-60-3Relevant articles and documents
Synthesis of carbacephem antibiotics: Synthesis via Dieckmann reaction using phenyl esters to direct the regioselectivity of the cyclization
Jackson, Bill G.,Gardner, John P.,Heath, Perry C.
, p. 6317 - 6320 (2007/10/02)
β-Ketoesters useful for elaboration to carbacephems were synthesized from a variety of enantiomerically pure diesters. Use of phenyl esters to direct the regioselectivity was demonstrated.
