6636-49-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6636-49-3 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, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6636-49:
(6*6)+(5*6)+(4*3)+(3*6)+(2*4)+(1*9)=113
113 % 10 = 3
So 6636-49-3 is a valid CAS Registry Number.
6636-49-3Relevant academic research and scientific papers
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.