133775-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133775-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,7,7 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133775-21:
(8*1)+(7*3)+(6*3)+(5*7)+(4*7)+(3*5)+(2*2)+(1*1)=130
130 % 10 = 0
So 133775-21-0 is a valid CAS Registry Number.
133775-21-0Relevant articles and documents
Enantiospecific routes to 3,4 disubstituted azetidinones
Kahn,Fujita
, p. 1137 - 1144 (2007/10/02)
Enantiospecific routes to 3,4 disubstituted azetidinones are outlined which commence with readily available β-ketoester precursors.
