21921-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21921-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,2 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21921-91:
(7*2)+(6*1)+(5*9)+(4*2)+(3*1)+(2*9)+(1*1)=95
95 % 10 = 5
So 21921-91-5 is a valid CAS Registry Number.
InChI:InChI=1/C15H15NO/c1-16-15(17)14-10-6-5-9-13(14)11-12-7-3-2-4-8-12/h2-10H,11H2,1H3,(H,16,17)
21921-91-5Relevant articles and documents
An Efficint Synthesis of 4-Aryl-1,2,3,4-terahydroisoquinolines
Narasimhan, Nurani S.,Patil, Prakash A.
, p. 191 - 192 (2007/10/02)
A general synthesis of N-methyl-1,2,3,4-tetrahydroisoquinolines from 3-aryl phthalides is described.