133657-13-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133657-13-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,6,5 and 7 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 133657-13:
(8*1)+(7*3)+(6*3)+(5*6)+(4*5)+(3*7)+(2*1)+(1*3)=123
123 % 10 = 3
So 133657-13-3 is a valid CAS Registry Number.
133657-13-3Relevant articles and documents
THE HANTZSCH SYNTHESIS WITH 5-AMINOURACILS: ONE STEP SYNTHESIS OF PYRIDOPYRIMIDINES
Kajino, Masahiro,Meguro, Kanji
, p. 2153 - 2161 (2007/10/02)
A one-step synthesis of new pyridopyrimidine derivatives (III) was achieved through the Hantzsch synthesis using 6-aminouracils (I) as enamine nucleophiles.
