178734-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 178734-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,7,3 and 4 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 178734-91:
(8*1)+(7*7)+(6*8)+(5*7)+(4*3)+(3*4)+(2*9)+(1*1)=183
183 % 10 = 3
So 178734-91-3 is a valid CAS Registry Number.
178734-91-3Relevant articles and documents
Stereospecific synthesis of the anaesthetic levobupivacaine
Adger, Brian,Dyer, Ulrich,Hutton, Gordon,Woods, Martin
, p. 6399 - 6402 (1996)
Enantiomerically pure (S)-bupivacaine is synthesized from the chiral pool using cheap and readily available (S)-lysine. The key steps in this efficient synthesis include an oxidative de-amination and stereospecific ring closure to form the pipecolamide core structure.
