7044-33-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7044-33-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,0,4 and 4 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7044-33:
(6*7)+(5*0)+(4*4)+(3*4)+(2*3)+(1*3)=79
79 % 10 = 9
So 7044-33-9 is a valid CAS Registry Number.
InChI:InChI=1/C35H52O15/c1-16-29(50-31-27(42)25(40)24(39)22(13-36)49-31)26(41)28(43)30(47-16)48-18-3-8-33(15-37)20-4-7-32(2)19(17-11-23(38)46-14-17)6-10-35(32,45)21(20)5-9-34(33,44)12-18/h11,15-16,18-22,24-31,36,39-45H,3-10,12-14H2,1-2H3/t16-,18+,19-,20+,21-,22-,24-,25+,26+,27-,28-,29?,30+,31+,32-,33+,34+,35+/m1/s1
7044-33-9Relevant articles and documents
SYNTHESIS OF CONVALLOSIDE
Makarevich, I. F.,Terno, I. S.
, p. 323 - 325 (2007/10/02)
The known natural diglycoside convalloside - strophanthidin 3β-O- - has been synthesized.The synthesis was carried out by the Koenigs-Knorr method via the preparation as intermediates of convallatoxin and its 2,3-isopropylidene derivative.Selectivity of glycosylation was achieved by the preliminary protection of the two OH groups in the cardenolide L-rhamnoside (convallatoxin).