title: Steroidal saponins from Smilax excelsa rhizomes.
abstract: From the n-butanol soluble fraction of the methanol extract of the rhizomes of Smilax excelsa, three new furostanol saponins 3-O-[4-O-acetyl-alpha-L-rhamnopyranosyl-(1 --> 2)-{alpha-L-rhamnopyranosyl-(1 --> 4)}-beta-D-glucopyranosyl]-26-O-[beta-D-glucopyranosyl]-22alpha-hydroxy-(25R)-furost-5-ene-3beta,26-diol (1), 3-O-[2-O-acetyl-alpha-L-rhamnopyranosyl-(1 --> 2)-{alpha-L-rhamnopyranosyl-(1 --> 4)}-beta-D-glucopyranosyl]-26-O-[beta-D-glucopyranosyl]-22alpha-hydroxy-(25R)-furost-5-ene-3beta,26-diol (2), 3-O-[3-O-acetyl-alpha-L-rhamnopyranosyl-(1 --> 2)-{alpha-L-rhamnopyranosyl-(1 --> 4)}-beta-D-glucopyranosyl]-26-O-[beta-D-glucopyranosyl]-22alpha-hydroxy-(25R)-furost-5-ene-3beta,26-diol (3), and three known saponins: protodioscin (4), pseudoprotodioscin (5) and dioscin (6) were isolated.
authors.affiliation: Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria. ivanova111@yahoo.com
authors.forename: Antoaneta
authors.initials: A
authors.lastname: Ivanova
authors.forename: Bozhanka
authors.initials: B
authors.lastname: Mikhova
authors.forename: Iris
authors.initials: I
authors.lastname: Klaiber
authors.forename: Dragomir
authors.initials: D
authors.lastname: Dinchev
authors.forename: Ivanka
authors.initials: I
authors.lastname: Kostova
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D027343:Rhizome / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D032281:Smilax / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D013256:Steroids