139306-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139306-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,3,0 and 6 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139306-53:
(8*1)+(7*3)+(6*9)+(5*3)+(4*0)+(3*6)+(2*5)+(1*3)=129
129 % 10 = 9
So 139306-53-9 is a valid CAS Registry Number.
139306-53-9Relevant academic research and scientific papers
Synthesis of O-Vinyl Oximes and Derived Penicillins using Organoselenium Intermediates
Stachulski, Andrew V.
, p. 3065 - 3070 (2007/10/02)
A synthetic scheme is described for the conversion of ethyl 2-hydroxyimino-3-oxobutyrate 3 into ethyl 2-(2-aminothiazol-4-yl)-2-vinyloxyiminoacetate 9 via ethyl 2--imino>-3-oxobutyrate 5.The analogous 2-(1-phenylvinyloxyim
