401569-67-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 401569-67-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,1,5,6 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 401569-67:
(8*4)+(7*0)+(6*1)+(5*5)+(4*6)+(3*9)+(2*6)+(1*7)=133
133 % 10 = 3
So 401569-67-3 is a valid CAS Registry Number.
401569-67-3Relevant academic research and scientific papers
1-METHYL-20-EPIVITAMIN D DERIVATIVE
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, (2008/06/13)
The object of the present invention is to synthesize vitamin D derivatives in which the 1-position is substituted with methyl and the steric configuration at the 20-position is epimerized. The present invention provides vitamin D derivatives of Formula (1