The CAS Registry Mumber 79678-81-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,6,7 and 8 respectively; the second part has 2 digits, 8 and 1 respectively. Calculate Digit Verification of CAS Registry Number 79678-81: (7*7)+(6*9)+(5*6)+(4*7)+(3*8)+(2*8)+(1*1)=202 202 % 10 = 2 So 79678-81-2 is a valid CAS Registry Number.
β-Lactams. IX. The synthesis of 7-β-phenylacetamido-3'-hydroxybenzo-[3,4]-O-2-isocephem, a weak antibacterial β-lactam antibiotic
Just,Tsantrizos,Ugolini
, p. 2981 - 2987 (1981)
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