CAS DataBase Reference:ent-(111S,5R)-11β,12β,19β,114-tetraacetoxy-15,11-epoxy-14-hydroxy-16α-(4-iodo-benzyloxy)-5r,6t-dimethyl-(13βH,17βH)-2,8-dioxa-1(12,3)-eudesmana-4(3,2)-pyridina-cyclooctaphane-18,3,7-trione(CAS DataBase Reference)
The CAS Registry Mumber 41679-80-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,6,7 and 9 respectively; the second part has 2 digits, 8 and 0 respectively. Calculate Digit Verification of CAS Registry Number 41679-80: (7*4)+(6*1)+(5*6)+(4*7)+(3*9)+(2*8)+(1*0)=135 135 % 10 = 5 So 41679-80-5 is a valid CAS Registry Number.
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