title: New triterpene saponins from Duranta repens Linn. and their cytotoxic activity.
abstract: From the leaves of Duranta repens (Verbenaceae) two new triterpene saponins, named durantanin IV (1) and V (2)were isolated.In addition, ten known compounds were isolated, namely a bidesmosidic saponin, oleanolic acid, three phenylethanoids and five flavonoids. All metabolites were isolated for the first time from this genus except for 3 (oleanolic acid) and 7 (E/Z acteoside). The structures were determined mainly by spectroscopic methods (UV, IR, HRESI-MS, (1)H-, (13)C-NMR, (1)H-(1)H COSY, HSQC and HMBC). Cytotoxic screening of the chloroform, ethyl acetate and methanol extracts was carried out on brine shrimps. In addition, the investigated methanol extract and compounds 1, 2 and 7 showed significant cytotoxic activity against a HepG2 cell line.
authors.affiliation: Department of Medicinal Chemistry, Theodor Bilharz Research Institute, Giza, Egypt. eb2003-eg@hotmail.com
authors.forename: Wafaa S
authors.initials: WS
authors.lastname: Ahmed
authors.forename: Mona A
authors.initials: MA
authors.lastname: Mohamed
authors.forename: Rabab A
authors.initials: RA
authors.lastname: El-Dib
authors.forename: Manal M
authors.initials: MM
authors.lastname: Hamed
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D001156:Artemia / Q000187:drug effects*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D045744:Cell Line, Tumor / Q000187:drug effects*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D008969:Molecular Sequence Data; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D029648:Verbenaceae / Q000033:anatomy & histology / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D012503:Saponins; D014315:Triterpenes