161391-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161391-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,3,9 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 161391-20:
(8*1)+(7*6)+(6*1)+(5*3)+(4*9)+(3*1)+(2*2)+(1*0)=114
114 % 10 = 4
So 161391-20-4 is a valid CAS Registry Number.
161391-20-4Relevant academic research and scientific papers
Studies towards the synthesis of esperamicinone
Clark, David A.,De Riccardis, Francesco,Nicolaou, Kyriacos C.
, p. 11391 - 11426 (2007/10/02)
A strategy is presented for the synthesis of esperamicinone (3), the aglycone of esperamicin A1. The route is based on an asymmetric epoxidation of a quinone monoketal. Two approaches for the installation of the vinylogous urethane are describe
