121002-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121002-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,0,0 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 121002-91:
(8*1)+(7*2)+(6*1)+(5*0)+(4*0)+(3*2)+(2*9)+(1*1)=53
53 % 10 = 3
So 121002-91-3 is a valid CAS Registry Number.
121002-91-3Relevant articles and documents
Direct Incorporation of a 6&α(7&α)-Formamido Group into Penicillin and Cephalosporin Sulphides and Sulphoxides
Branch, Clive L.,Pearson, Michael J.,Smale, Terence C.
, p. 2865 - 2874 (2007/10/02)
6β(7β)--penicillins and -cephalosporins have been converted into the corresponding 6α(7α)-formamido-6β(7β)-(2,2,2-trichloroethoxycarbonylamino) derivatives by treatment with N,N-bis(trimet
