title: Two new biphenanthrenes with cytotoxic activity from Bulbophyllum odoratissimum.
abstract: Two new dimeric phenanthrenes, bulbophythrins A (1) and B (2), were isolated from Bulbophyllum odoratissimum. Their structures were elucidated by HR-ESI-MS, 1D and 2DNMR spectroscopy. They were evaluated in vitro for their inhibitory ability against the growth of human leukemia cell lines K562 and HL-60, human lung adenocarcinoma A549, human hepatoma BEL-7402 and human stomach cancer SGC-7901. Both compounds showed significant cytotoxicity against the tested cell lines. Compound 1 exhibited some selectivity against HL-60 and BEL-7402 with IC(50) values of 1.27 x 10(-3) and 1.22 x 10(-3) micromol/ml respectively, whereas 2 was most active against A549 with IC(50) value of 1.18 x 10(-3) micromol/ml.
authors.affiliation: Department of Chemistry, Yunnan Normal University, Kunming 650092, China.
authors.forename: Junju
authors.initials: J
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Yu
authors.forename: Chen
authors.initials: C
authors.lastname: Qing
authors.forename: Yanli
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Yegao
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy; D045744:Cell Line, Tumor; D006801:Humans; D009369:Neoplasms / Q000188:drug therapy*; D019906:Nuclear Magnetic Resonance, Biomolecular; D029595:Orchidaceae; D010616:Phenanthrenes / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D010616:Phenanthrenes; D010936:Plant Extracts; C544780:bulbophythrin A; C544781:bulbophythrin B