111003-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 111003-57-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,0,0 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 111003-57:
(8*1)+(7*1)+(6*1)+(5*0)+(4*0)+(3*3)+(2*5)+(1*7)=47
47 % 10 = 7
So 111003-57-7 is a valid CAS Registry Number.
111003-57-7Relevant articles and documents
A STEREOSELECTIVE APPROACH TO 1β-METHYLCARBAPENEM ANTIBIOTIC STARTING FROM (R)-(-)-3-HYDROXYBUTYRIC ACID ESTER
Hatanaka, Minoru
, p. 83 - 86 (2007/10/02)
The chiral key intermediate of 1β-methylcarbapenem antibiotic is synthesized via (2R,3R,4S,5R)-3-amino-2,5-dimethyl-5-pentanolide-4-carboxylic acid, which is prepared in a stereoselective manner from (R)-(-)-hydroxy-butyrate.
