72755-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72755-21-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,7,5 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 72755-21:
(7*7)+(6*2)+(5*7)+(4*5)+(3*5)+(2*2)+(1*1)=136
136 % 10 = 6
So 72755-21-6 is a valid CAS Registry Number.
72755-21-6Relevant articles and documents
Synthesis of (±)-roxburghilin and (±)-epiroxburghilin
Nagasaka, Tatsuo,Yamamoto, Hiroto,Sugiyama, Akio,Hamaguchi, Fumiko
, p. 2219 - 2224 (2007/10/02)
The synthesis of (±)-roxburghilin (15) and (±)-epiroxburghilin (16) in six steps from 2-pyrrolidinone is described.