139448-33-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139448-33-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,4 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139448-33:
(8*1)+(7*3)+(6*9)+(5*4)+(4*4)+(3*8)+(2*3)+(1*3)=152
152 % 10 = 2
So 139448-33-2 is a valid CAS Registry Number.
139448-33-2Relevant academic research and scientific papers
Process for preparing azetidin-2-one derivatives
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, (2008/06/13)
A process for preparing an azetidin-2-one derivative represented by formula (2): STR1 wherein R4 and R5, which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, or an alkyl