118735-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 118735-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,7,3 and 5 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 118735-54:
(8*1)+(7*1)+(6*8)+(5*7)+(4*3)+(3*5)+(2*5)+(1*4)=139
139 % 10 = 9
So 118735-54-9 is a valid CAS Registry Number.
118735-54-9Relevant academic research and scientific papers
A Synthesis of (3S,4R)-3--4-carboxymethyl-2-azetidinone, the Thienamycin Intermadiate, from (S)-Ethyl Lactate
Ito, Yoshio,Terashima, Shiro
, p. 445 - 448 (2007/10/02)
The title thienamycin intermadiate was efficiently synthesized from (S)-ethyl lactate (3) by subjecting (3S,4S)-32-acetyl-4--2-azetidinone readily obtainable from 3, to sequential reactions in which base catalyzed elimination and reg
