title: A new labdane diterpene from the flowers of Solidago canadensis.
abstract: A new labdane diterpene, 9alpha,16xi-dihydroxy-6-oxo-7,13-labdadien-15,16-olide (solicanolide, 1) and six known compounds identified as quercetin (2), 3-O-caffeoylquinic acid (3, neochlorogenic acid), 5-O-caffeoylquinic acid (4, chlorogenic acid), 4,5-di-O-caffeoylquinic acid (5), 3,5-di-O-caffeoylquinic acid (6) and 3,4-di-O-caffeoylquinic acid (7) were isolated from the flowers of Solidago canadensis. To our knowledge, compound 7 was isolated for the first time in S. canadensis. This work describes the isolation of compounds 1-7 and the structure elucidation of a new compound identified as compound 1. Solicanolide (1) showed cytotoxic activity against A549 (IC(50): 13+/-2 microM), DLD-1 (IC(50): 26+/-2 microM) and WS1 (IC(50): 17+/-1 microM) cell lines.
authors.affiliation: LASEVE, Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Quebec, Canada.
authors.forename: Marie-Eve
authors.initials: ME
authors.lastname: Bradette-Hébert
authors.forename: Jean
authors.initials: J
authors.lastname: Legault
authors.forename: Serge
authors.initials: S
authors.lastname: Lavoie
authors.forename: André
authors.initials: A
authors.lastname: Pichette
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002170:Canada; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D035264:Flowers / Q000737:chemistry; D006801:Humans; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D036624:Solidago / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes; C525765:solicanolide