title: Diterpenes from Helianthus annuus and their cytotoxicity in vitro.
abstract: To search for bioactive compounds from the flower disc of Helianthus annuus L., chromatography was used to isolate and purify the chemical constituents, their structures were identified by spectral analysis, MTT method was applied to investigate their cytotoxic activities, some compounds showed moderate cytotoxic activities on SF-268, MCF-7 and HepG2 cell lines. Eleven compounds were obtained from the flower disc of H. annuus, and identified as ent-kaurane-2alpha, 16alpha-diol (1) and entkaurane-15alpha,16alpha-epoxy-17-al-19-oic acid (2), and nine known diterpenes, ent-kaurane-16P-ol (3), phyllocladan-16beta-ol (4) , ent-atisan-16a-ol (5) , grandifloric acid (6) , angeloylgrandifloric acid (7), ent-kaurane-16-en-19-oic acid (8), ent-kaurane-17-hydroxy-15-en-19-oic acid (9), ent-kaurane-16beta, 17-dihydroxy-19-oic acid (10), and ciliaric acid (11). Compounds 1 and 2 are new compounds, some compounds showed cytotoxic activities on SF-268, MCF-7 and HepG2 cell lines.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100094, China. suomaorong@163.com
authors.forename: Mao-rong
authors.initials: MR
authors.lastname: Suo
authors.forename: Ze
authors.initials: Z
authors.lastname: Tian
authors.forename: Jun-shan
authors.initials: JS
authors.lastname: Yang
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.forename: Lü
authors.initials: L
authors.lastname: Wu
authors.forename: Wu
authors.initials: W
authors.lastname: Li
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003460:Crystallization; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D045786:Diterpenes, Kaurane / Q000737:chemistry / Q000302:isolation & purification*; D035264:Flowers / Q000737:chemistry; D006368:Helianthus / Q000737:chemistry*; D006801:Humans; D020128:Inhibitory Concentration 50; D008968:Molecular Conformation; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D044366:Transition Temperature
chemical_list: C528687:16-phyllocladanol; D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes; D045786:Diterpenes, Kaurane; C530029:ent-kaurane-15,16-epoxy-17-al-19-oic acid; C530028:ent-kaurane-2,16-diol