137539-33-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137539-33-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,3 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137539-33:
(8*1)+(7*3)+(6*7)+(5*5)+(4*3)+(3*9)+(2*3)+(1*3)=144
144 % 10 = 4
So 137539-33-4 is a valid CAS Registry Number.
137539-33-4Relevant academic research and scientific papers
The Synthesis of Octahydro-7-phenylpyrazinobenzazepines
Ohnmacht, Cyrus J.,McLaren, Frances M.
, p. 1219 - 1224 (2007/10/02)
Octahydro-7-phenylpyrazinobenzazepine (1a) was prepared from 1-methyl-3-phenylmethylpiperazine 5a by reaction with styrene oxide followed by sulfuric acid cyclization of the resulting alcohol 6a.The diastereomeric mixture 1a was further separate
