158977-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158977-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,9,7 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 158977-57:
(8*1)+(7*5)+(6*8)+(5*9)+(4*7)+(3*7)+(2*5)+(1*7)=202
202 % 10 = 2
So 158977-57-2 is a valid CAS Registry Number.
158977-57-2Relevant academic research and scientific papers
Synthesis and Structure of Pyrimido-1,2,4-triazines
Ibrahim, Yehia A.,Elwahy, Ahmed H.M.,Gad, Shadia A.A.
, p. 1115 - 1122 (2007/10/02)
The isomeric pyrimido triazines 6 and pirimido triazine 11 were synthesized by cyclization of the appropriate α-keto acid pyrimidin-2-yl-hydrazones 2a-f in acetic acid or acetic anhydride respectively.Also, the α-keto acid hydr
