74643-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74643-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,4 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 74643-21:
(7*7)+(6*4)+(5*6)+(4*4)+(3*3)+(2*2)+(1*1)=133
133 % 10 = 3
So 74643-21-3 is a valid CAS Registry Number.
74643-21-3Relevant articles and documents
Tricyclic cepham compounds
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, (2008/06/13)
The compounds having a 4,11-dioxo-3-oxa-8(or 7)-thia-1-azatricyclo[7,2,0,02,6 ]undecane-2-carboxylic acid skeleton as the base structure, their esters and their salts are useful antibacterial agents.
