57289-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57289-51-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,2,8 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57289-51:
(7*5)+(6*7)+(5*2)+(4*8)+(3*9)+(2*5)+(1*1)=157
157 % 10 = 7
So 57289-51-7 is a valid CAS Registry Number.
57289-51-7Relevant articles and documents
AN APPROACH TO ERYTHROPHLEUM ALKALOIDS. SYNTHESIS OF METHYL(-)-4-EPI-CASSAMATE
Abad, A.,Agullo, C.,Arno, M.,Domingo, L. R.,Zaragoza, R. J.
, p. 3289 - 3292 (2007/10/02)
A synthetic approach to Erythrophleum alkaloids, involving as a key-step the regiospecific deprotonation of the ketone 5a, is described.