72221-15-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72221-15-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,2,2 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 72221-15:
(7*7)+(6*2)+(5*2)+(4*2)+(3*1)+(2*1)+(1*5)=89
89 % 10 = 9
So 72221-15-9 is a valid CAS Registry Number.
72221-15-9Relevant articles and documents
14,17-Ethano-norcodeinone
Fleischhacker, W.,Richter, B.
, p. 837 - 848 (1992)
A new codeinone derivative was synthesized starting with northebaine which might be of interest with regard to the question of opiate-receptor affinity in the sense of its rigidity near the anionic side of the alkaloid.Keywords. 14,17-Cycloethanocodeinone