77661-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77661-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,6 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77661-91:
(7*7)+(6*7)+(5*6)+(4*6)+(3*1)+(2*9)+(1*1)=167
167 % 10 = 7
So 77661-91-7 is a valid CAS Registry Number.
77661-91-7Relevant academic research and scientific papers
Syntheses of Four Thiol-Substituted Crown Ethers.
Rastetter, William H.,Phillion, Dennis P.
, p. 3204 - 3208 (2007/10/02)
Approaches to thiol-substituted crown ethers of the 18-crown-6 and 19-crown-6 classes are described.Different modes of covalent attachment of the thiol to the crown ether provide variations in the spatial relationship of the thiol to the crown ether binding site.
