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Identification of triterpenes from milkweed (Asclepias syriaca)
Erzsébet Háznagy-Radnai1, Edit Wéber, Szilvia Czigle
1Department of Pharmacognosy, University of Szeged, Eötvös str. 6., H-672, Hungary. haznagy.radnai@pharm.u-szeged.hu
Abstract:
The chloroform extract of Asclepias syriaca stem were investigated. Three triterpenes were isolated by TLC, VLC, and preparative chromatography, and their structures established by one and two-dimensional NMR spectroscopy. Lupenyl acetate has been isolated for the first time from A. syriaca; this is thefirst representative of a triterpene bearing a lupane skeleton in this species. In addition, alpha-amyrin acetate and alpha-amyrin butyrate were isolated.
