103957-95-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103957-95-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,5 and 7 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 103957-95:
(8*1)+(7*0)+(6*3)+(5*9)+(4*5)+(3*7)+(2*9)+(1*5)=135
135 % 10 = 5
So 103957-95-5 is a valid CAS Registry Number.
103957-95-5Relevant articles and documents
PRACTICAL SYNTHESIS OF UNNATURAL (+)-PHYSOSTIGMINE AND CARBAMATE ANALOGUES
Yu, Qian-Sheng,Brossi, Arnold
, p. 745 - 750 (2007/10/02)
Details of a synthesis of unnatural (+)-physostigmine (5) prepared from urea 1 via (+)-eseroline (4) are given.Preparation of (+)-octylcarbamate 6, (+)-benzylcarbamate 7, (+)-phenylcarbamate 8 and (+)-N-methylphysostigmine (9) from (+)-eseroline (4) is also described.