63881-88-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 63881-88-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,3,8,8 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 63881-88:
(7*6)+(6*3)+(5*8)+(4*8)+(3*1)+(2*8)+(1*8)=159
159 % 10 = 9
So 63881-88-9 is a valid CAS Registry Number.
63881-88-9Relevant articles and documents
PRACTICAL PROCEDURE FOR EPIMERIZATION OF 7α-AMINO-1-OXACEPHEMS TO 7β-AMINO EPIMERS
Aoki, T.,Haga, N.,Sendo, Y.,Konoike, T.,Yoshioka, M.,Nagata, W.
, p. 339 - 342 (2007/10/02)
7α-Amino-1-oxacephems can be epimerized to their 7β-amino epimers by treatment with chloral to give Schiff bases, followed by dehydrochlorination with Huenig base, borohydride reduction, and hydrolysis.
