Cytotoxic furostanol saponins and a megastigmane glucoside from Tribulus parvispinus

Angela Perrone, Alberto Plaza, Elena Bloise, Patrizia Nigro, Arafa I. Hamed, Maria Antonietta Belisario, Cosimo Pizza, Sonia Piacente

Research output: Contribution to journalArticlepeer-review

Abstract

Two new furostanol saponins, (25R)-26-O-β-D-glucopyranosyl-5α- furostan-2α,3β,22α,26-tetraol 3-O-{β-D-galactopyranosyl- (1→2)-O-[β-D-xylopyranosyl-(1→3)]-O-β-D-glucopyranosyl- (1→4)-β-D-galactopyranoside} (1) and (25R)-26-O-β-D- glucopyranosyl-5α-furostan-3β,22α,26-triol 3-O-{β-D- galactopyranosyl-(1→2)-O-[β-D-xylopyranosyl-(1→3)] -O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside} (2), and their O-methyl derivatives (3 and 4), and a new megastigmane glucoside, (6S,7E,9ξ)-6,9,10-trihydroxy-4,7-megastigmadien-3-one 10-O-β-D- glucopyranoside (6), along with one known spirostanol saponin, gitonin (5), and four known megastigmane glucosides were isolated from the aerial parts of Tribulus parvispinus. Their structures were established by detailed spectroscopic analysis. The cytotoxic activities of 1-6 against U937, MCF7, and HepG2 cells were evaluated. Compounds 2 (IC50 0.5 μM) and 5 (IC50 0.1 μM) showed the highest activity against U937 cells.

Original languageEnglish
Pages (from-to)1549-1553
Number of pages5
JournalJournal of Natural Products
Volume68
Issue number10
DOIs
Publication statusPublished - Oct 2005

ASJC Scopus subject areas

  • Plant Science
  • Chemistry (miscellaneous)
  • Drug Discovery
  • Organic Chemistry
  • Pharmacology

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