131696-56-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131696-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,6,9 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 131696-56:
(8*1)+(7*3)+(6*1)+(5*6)+(4*9)+(3*6)+(2*5)+(1*6)=135
135 % 10 = 5
So 131696-56-5 is a valid CAS Registry Number.
131696-56-5Relevant articles and documents
Condensed pyrroles: N1-benzyl-2,5,6-trimethylpyrrolo[2,3-d]- 1,3-oxazin-4-ones and n1-benzyl-2,5,6-trimethyl-3-substituted-pyrrolo[2,3-d] pyrimidin-4-ones
Hassan,Bayomi,Ali
, p. 764 - 768 (2007/10/03)
Convenient routes are reported for the synthesis of fused pyrrolo[2, 3-d]-1, 3-oxazine 2 and pyrrolo[2, 3-d]pyrimidine derivatives 4 from N-benzyl-2-amino-3-t-butoxycarbonyl-4, 5-dimethylpyrrole 1.