The CAS Registry Mumber 80784-51-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,7,8 and 4 respectively; the second part has 2 digits, 5 and 1 respectively. Calculate Digit Verification of CAS Registry Number 80784-51: (7*8)+(6*0)+(5*7)+(4*8)+(3*4)+(2*5)+(1*1)=146 146 % 10 = 6 So 80784-51-6 is a valid CAS Registry Number.
SEMISYNTHETIC PENICILLINS. XVIII. NEW PHENOXYMETHYLPENICILLIN ANALOGS
Mndzhoyan, Sh. L.,Marukhyan, N. D.,Ter-Zakharyan, Yu. Z.,Kazaryan, E. V.,Sakanyan, V. S.
, p. 864 - 867 (2007/10/02)
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