191987-08-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191987-08-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,9,8 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 191987-08:
(8*1)+(7*9)+(6*1)+(5*9)+(4*8)+(3*7)+(2*0)+(1*8)=183
183 % 10 = 3
So 191987-08-3 is a valid CAS Registry Number.
191987-08-3Relevant academic research and scientific papers
EPC Synthesis of (+)-Heptelidic Acid
Riehs,Urban
, p. 281 - 289 (2007/10/03)
An EPC (enantiomerically pure compound) synthesis of the antibiotic natural product (+)-heptelidic acid (1) is presented. Key step of the synthesis is a conjugate addition of the acetal protected vinyl cuprate 4 to the auxiliary shielded enoate 5n which g
