77661-89-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77661-89-3 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, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77661-89:
(7*7)+(6*7)+(5*6)+(4*6)+(3*1)+(2*8)+(1*9)=173
173 % 10 = 3
So 77661-89-3 is a valid CAS Registry Number.
77661-89-3Relevant articles and documents
Syntheses of Four Thiol-Substituted Crown Ethers.
Rastetter, William H.,Phillion, Dennis P.
, p. 3204 - 3208 (1981)
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.
