The CAS Registry Mumber 87649-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,6,4 and 9 respectively; the second part has 2 digits, 5 and 3 respectively. Calculate Digit Verification of CAS Registry Number 87649-53: (7*8)+(6*7)+(5*6)+(4*4)+(3*9)+(2*5)+(1*3)=184 184 % 10 = 4 So 87649-53-4 is a valid CAS Registry Number.
A direct, regio- and stereoselective 1α-hydroxylation of (5E)-calciferol derivatives
Andrews,Barton,Cheng,et al.
, p. 1635 - 1637 (2007/10/02)
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