81756-83-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81756-83-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,5 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81756-83:
(7*8)+(6*1)+(5*7)+(4*5)+(3*6)+(2*8)+(1*3)=154
154 % 10 = 4
So 81756-83-4 is a valid CAS Registry Number.
81756-83-4Relevant academic research and scientific papers
Synthesis of 5(H)-Arylindenopyridazin-3(2H)-ones
Omar, M. T.,Eid, M. E.
, p. 1097 - 1099 (2007/10/02)
The reaction of ethyl 1-oxo-3-phenyl- and 1-oxo-3-(4'-methoxyphenyl)-6-methoxy-2-indenylacetates (1a and 1b) with excess of hydrazine hydrate affords 5(H)-phenyl- and 5H-8-methoxy-5-(4'-methoxyphenyl)-indenopyridazin-3(2H)-ones ( 3a and 3b), respec
