156491-49-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156491-49-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,9 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 156491-49:
(8*1)+(7*5)+(6*6)+(5*4)+(4*9)+(3*1)+(2*4)+(1*9)=155
155 % 10 = 5
So 156491-49-5 is a valid CAS Registry Number.
156491-49-5Relevant academic research and scientific papers
4-heteryl-β-lactams : A facile synthesis of 1-aryl-4- [isopropylideneamino/methyl-4(3H)-oxoquinazolin-2-yl] azetidin-2-ones
Reddy,Vasantha,Naga Raju
, p. 40 - 44 (2007/10/03)
A facile and efficient synthesis of 4-quinazolinonyl-β-lactams 9 and 10 starting from 2-chloromethylquinazolin-4(3H)-ones 1 is reported.
