204515-22-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204515-22-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,5,1 and 5 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 204515-22:
(8*2)+(7*0)+(6*4)+(5*5)+(4*1)+(3*5)+(2*2)+(1*2)=90
90 % 10 = 0
So 204515-22-0 is a valid CAS Registry Number.
204515-22-0Relevant articles and documents
An economical synthesis of famciclovir
Hijiya, Toyoto,Yamashita, Keizo,Kojima, Mitsuhiko,Uchida, Yumiko,Katayama, Satoshi,Torii, Takayoshi,Shiragami, Hiroshi,Izawa, Kunisuke
, p. 653 - 654 (1999)
An economical synthesis of famciclovir from N-2-acetyl-7-benzylguanine by a novel regioselective alkylation with the diester cyclopropane compound was developed.
