New withanolides, daturataturins A and B from Datura tatura L.

Two new C28 steroidal glycosides called daturataturin A (1a) and daturataturin B (2a) were isolated from the methanolic extract of the fresh aerial parts of Datura tatura L. (Solanaceae), and their chemical structures were characterized as (22R)-7α, 27-dihydroxy-1-oxowitha-2, 5, 24-trienolide 27-O-β-D-glucopyranoside and (22R)-1α, 3β, 7α, -27-tetrahydroxywitha-5, 24-dienolide 3-O-β-D-glucopyranoside by spectral analysis.