99463-49-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99463-49-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,4,6 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99463-49:
(7*9)+(6*9)+(5*4)+(4*6)+(3*3)+(2*4)+(1*9)=187
187 % 10 = 7
So 99463-49-7 is a valid CAS Registry Number.
99463-49-7Relevant articles and documents
TOTAL SYNTHESIS OF (+/-)-PODOPHYLLOTOXIN AND (+/-)-EPIPODOPHYLLOTOXIN
Eyken, J. Van der,Clercq, P. de,Vandewalle, M.
, p. 4297 - 4308 (2007/10/02)
A novel approach to (+/-)-epipodophyllotoxin (2c) and hence also to (+/-)-podophyllotoxin (1c) is described, involving as a key-step the stereoselective ring closure of the TMS-ester derived from 17a to the tetralin derivative 30c with mesyl chloride.