139263-65-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139263-65-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,6 and 3 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139263-65:
(8*1)+(7*3)+(6*9)+(5*2)+(4*6)+(3*3)+(2*6)+(1*5)=143
143 % 10 = 3
So 139263-65-3 is a valid CAS Registry Number.
139263-65-3Relevant articles and documents
Synthesis of a dual-action cephalosporin: A novel approach to 3-acyloxymethyl-3-cephems
Okabe,Sun
, p. 1160 - 1164 (2007/10/02)
A practical synthesis of the dual-action cephalosporin 5 from 7-aminocephalosporanic acid (7-ACA), S-benzothiazol-2-yl (2-amino-4-thiazolyl)(methoxyimino)thioacetate (MAEM), and fleroxacin [6,8-difluoro-1-(2-fluoroethyl)-1,4-dihydro-7-(4-methyl-1-piperazi
