138548-44-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138548-44-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,4 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 138548-44:
(8*1)+(7*3)+(6*8)+(5*5)+(4*4)+(3*8)+(2*4)+(1*4)=154
154 % 10 = 4
So 138548-44-4 is a valid CAS Registry Number.
138548-44-4Relevant articles and documents
Pyrazolo[3,4-d]pyrimidine analogues of isoguanine
Quinn,Scammells
, p. 6787 - 6788 (2007/10/02)
4-Amino-1-phenyl-5H-pyrazolo[3,4-d]pyrimidin-6-one (5a) was synthesized in 68% yield in a one pot reaction involving the condensation of 5-amino-1-phenylpyrazole-4-carbonitrile with benzoyl isocyanate followed by an annulation with ammonia.
