title: ent-Kaurenoic acids from Mikania hirsutissima (Compositae).
abstract: Four ent-kaurenoic acid derivatives, 2beta,16alpha,17-trihydroxy-ent-kauran-19-oic acid (1), 3beta,16alpha,17-trihydroxy-ent-kauran-19-oic acid (2), 11alpha,15beta-dihydroxy-7-O-beta-d-glucopyranosyl-ent-kaur-16-en-19-oic acid (3) and 1alpha,15beta-dihydroxy-7-O-beta-d-glucopyranosyl-ent-kaur-16-en-19-oic acid (4), were isolated together with five known compounds, 1,5-dicaffeoyl-quinic acid (5), 2-O-glucosyloxy-4-methoxy-cinnamic acid (6), phenethyl alcohol glucoside (7), phenethyl-1-O-beta-d-apiofuranosyl (1-->2) beta-d-glucopyranoside (sayaendoside) (8) and 3,6-dihydroxy-beta-ion-9-ol (9) from the 50% aqueous acetone extract of the aerial parts of Mikania hirsutissima DC. (Compositae). Compounds 1-9 were tested for their proliferative activity toward peripheral blood mononuclear cells (hPBMC); compounds 1 and 2 showed significant activity (43.8% and 36.7%, at 100 microM, respectively) on the lymphocyte.
authors.affiliation: College of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi, Chiba 274-8555, Japan.
authors.forename: Emika
authors.initials: E
authors.lastname: Ohkoshi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kamo
authors.forename: Mitsuko
authors.initials: M
authors.lastname: Makino
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Fujimoto
mesh_terms: D002455:Cell Division / Q000187:drug effects; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D008214:Lymphocytes / Q000166:cytology / Q000187:drug effects; D035742:Mikania / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods; D035261:Plant Components, Aerial / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D004224:Diterpenes; D010936:Plant Extracts; C051436:kaurenoic acid