An androstane bioside and 3'-thiazolidinone derivatives of doubly-linked cardenolide glycosides from the roots of Asclepias tuberosa.
Steroidal compounds in the roots of Asclepias tuberosa were investigated and 17alpha-hydroxyandrosta-4,6,15-trien-3-one 17-O-alpha-L-arabinopyranosyl-(1-->6)-beta-D-glucopyranoside, termed ascandroside, was isolated from the CHCl3-soluble fraction. Among five doubly-linked cardenolide glycosides, two were identified as 3'-spiro-linked thiazolidinone (4) and S-oxythiazolidinone derivatives (5) of delta5-calotropin. The stereochemistry at the C-3' in these two cardenolides is discussed. 3'-O-beta-D-Glucopyranosyl-delta5-calotropin (3) was also isolated along with A5-calotropin and its 3'-acetate. Nine glycosides of uzarigenin, coroglaucigenin and corotoxigenin were identified.
Faculty of Pharmaceutical Sciences, Fukuoka University, Japan. abefumi@fukuoka-u.ac.jp
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Abe
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Yamauchi
D000731:Androstanes / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry
D000731:Androstanes; D006027:Glycosides; C417428:ascandroside; C033936:androstane