331993-25-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 331993-25-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,9,9 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 331993-25:
(8*3)+(7*3)+(6*1)+(5*9)+(4*9)+(3*3)+(2*2)+(1*5)=150
150 % 10 = 0
So 331993-25-0 is a valid CAS Registry Number.
331993-25-0Relevant 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.