134577-34-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134577-34-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,5,7 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 134577-34:
(8*1)+(7*3)+(6*4)+(5*5)+(4*7)+(3*7)+(2*3)+(1*4)=137
137 % 10 = 7
So 134577-34-7 is a valid CAS Registry Number.
134577-34-7Relevant articles and documents
An alternative synthesis of cardiotonic 6-(3,4-dihydro-3-oxo-1,4(2H)benzoxazin-7-yl)-2,3,4,5-tetrahydro-5-met hylpyridazin-3-ones
Moussavi,Depreux,Lesieur
, p. 271 - 278 (2007/10/02)
Useful therapeutic 6-(3,4-dihydro-3-oxo-1,4(2H)benzoxazin-7-yl)-2,3,4,5-tetrahydro-5-met hylpyridazin-3-ones can be conveniently prepared from 6-propionyl-1,3 benzoxazolin-2-ones using α,β unsaturated ketone as intermediate.