129663-13-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129663-13-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,6,6 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 129663-13:
(8*1)+(7*2)+(6*9)+(5*6)+(4*6)+(3*3)+(2*1)+(1*3)=144
144 % 10 = 4
So 129663-13-4 is a valid CAS Registry Number.
InChI:InChI=1/C9H11NO4/c1-4-13-9(12)7-5(2)10-14-8(7)6(3)11/h4H2,1-3H3
129663-13-4Relevant articles and documents
Synthesis of Isoxazolopyridazin-4(5H)-ones and 4-Acyl-5-hydroxy-3(2H)-pyridazinones
Chantegrel, Bernard,Deshayes, Christian,Pujol, Bernard,Wei, Zhong Jia
, p. 927 - 934 (2007/10/02)
The title compounds were prepared from ethyl 5-acyl- or 5-(1-hydroxyethenyl)isoxazole-4-carboxylates which in turn were prepared from ethyl 3-methylamino-2-butenoate or 3(2H)-furanones.