title: Cytotoxic constituents from Solanum lyratum.
abstract: Activity-guided fractionation of the ethanol extract of the whole plant from Solanum lyratum resulted in the isolation of a new pregnane derivative glycoside, 16-dehydropregnenolone 3-O-alpha-L-rhamnopyranosyl-(1 --> 2)-beta-D-glucopyranosid uronic acid (2), as well as other six known compounds: 16-dehydropregnenolone (1), allopregenolone (3), protocatechuic acid (4), vanillic acid (5), caffeic acid (6), and scopoletin (7). The structures of the isolated compounds were elucidated on the basis of their spectral data and chemical evidences. Compounds 1, 3, 4 were isolated for the first time from this plant. Cytotoxic activities of the isolated compounds were evaluated. Compound 1 exhibited significant cytotoxic activity against A375-S2, HeLa, SGC-7901, and Bel-7402 with IC50 values of 13.1 +/- 0.9, 21.5 +/- 1.0, 40.2 +/- 0.7, and 49.8 +/- 1.2 microg/mL, respectively.
authors.affiliation: College of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Li-Xin
authors.initials: LX
authors.lastname: Sun
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Fu
authors.forename: Jing
authors.initials: J
authors.lastname: Ren
authors.forename: Liang
authors.initials: L
authors.lastname: Xu
authors.forename: Kai-Shun
authors.initials: KS
authors.lastname: Bi
authors.forename: Min-Wei
authors.initials: MW
authors.lastname: Wang
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006367:HeLa Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D011284:Pregnenolone / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D032322:Solanum / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; C003592:16-dehydropregnenolone; D011284:Pregnenolone