title: Iridoid glucosides and p-coumaroyl iridoids from Viburnum luzonicum and their cytotoxicity.
abstract: Four new iridoids glucosides (1-4) and seven new iridoid aglycons (5-11) bearing (E)- or (Z)-p-coumaroyl groups were isolated from a methanol extract of the dried leaves of Viburnum luzonicum collected in Kaoshiung, Taiwan. The structures of the new compounds, named luzonoside A (1), luzonoside B (2), luzonoside C (3), luzonoside D (4), luzonoid A (5), luzonoid B (6), luzonoid C (7), luzonoid D (8), luzonoid E (9), luzonoid F (10), and luzonoid G (11), were elucidated by analysis of spectroscopic data and comparison with values for previously known analogues. Among the iridoids isolated in the present study, glucosides 1 and 2, and their aglycons 5-9, exhibited moderate inhibitory activity against HeLa S3 cancer cells, whereas 3 and 4 showed no cytotoxicity even at 100 microM.
authors.affiliation: Institute of Pharmacognosy, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan. fukuyama@ph.bunri-u.ac.jp
authors.forename: Yoshiyasu
authors.initials: Y
authors.lastname: Fukuyama
authors.forename: Yuka
authors.initials: Y
authors.lastname: Minoshima
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Kishimoto
authors.forename: Ih-Sheng
authors.initials: IS
authors.lastname: Chen
authors.forename: Hironobu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Esumi
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006367:HeLa Cells / Q000187:drug effects; D006801:Humans; D039823:Iridoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013624:Taiwan; D014407:Tumor Cells, Cultured; D027925:Viburnum / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D039823:Iridoids