191987-07-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191987-07-2 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 7 respectively.
Calculate Digit Verification of CAS Registry Number 191987-07:
(8*1)+(7*9)+(6*1)+(5*9)+(4*8)+(3*7)+(2*0)+(1*7)=182
182 % 10 = 2
So 191987-07-2 is a valid CAS Registry Number.
191987-07-2Relevant academic research and scientific papers
Riehs,Urban
, p. 281 - 289 (1997)
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
