
TY  - JOUR
A1  - Siddiqui, Bina S. 
A1  - Afreen, Shamsul 
A1  - Begum, Sabira 
T1  - Two New Withanolides from the Aerial Parts of <emph type="2">Datura innoxia</emph>
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1999
VL  - 52
IS  - 9
SP  - 905
EP  - 908
KW  - 
UR  - https://doi.org/10.1071/CH99033 
N2  - Two new steroidal lactones of the withanolide group named as withametelinol (1a) and withametelinone (2) have been isolated from the aerial parts of Datura innoxia along with withametelin. The structures of the new constituents have been established as (20R,22R)-21,24-epoxy-12&#945;-hydroxy-1-oxowitha-2,5,25(27)-trienolide and (20R,22R)-21,24-epoxy-1,12-dioxowitha-2,5,25(27)-trienolide through spectroscopic studies including one- and two-dimensional (COSY-45, NOESY, HMQC, HMBC) n.m.r. spectroscopy and chemical transformations. 
ER  -

