The CAS Registry Mumber 86231-89-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,6,2,3 and 1 respectively; the second part has 2 digits, 8 and 9 respectively. Calculate Digit Verification of CAS Registry Number 86231-89: (7*8)+(6*6)+(5*2)+(4*3)+(3*1)+(2*8)+(1*9)=142 142 % 10 = 2 So 86231-89-2 is a valid CAS Registry Number.
A simplified synthesis of 8-substituted purine nucleosides via lithiation of 6-chloro-9-(2,3-O-isopropylidene-β-D-ribofuranosyl)purine
Tanaka,Uchida,Shinozaki,et al.
, p. 787 - 790 (2007/10/02)
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