6636-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6636-51-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,3 and 6 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6636-51:
(6*6)+(5*6)+(4*3)+(3*6)+(2*5)+(1*1)=107
107 % 10 = 7
So 6636-51-7 is a valid CAS Registry Number.
6636-51-7Relevant articles and documents
A Novel Construction of the c Ring of an Aromatic Steroid: New Syntheses of Equilenin and Isoequilenin
Narasimhan, Nurani S.,Bapat, Chintamani P.
, p. 1435 - 1439 (2007/10/02)
A new approach for the construction of the c ring of an aromatic steroid, utilising the Diels-Alder reaction, is described.It has been used to synthesise equilenin and isoequilenin.