title: Combretastatins D-3 and D-4, new macrocyclic lactones from Getonia floribunda.
abstract: Chemical investigation of biologically active compounds of Getonia floribunda led to the isolation of two new macrocyclic lactones, combretastatins D-3 (1) and D-4 (2). The structures of these compounds were confirmed by spectroscopic analyses. Combretastatin D-3 (1) exhibited cytotoxicity towards the small-cell lung cancer cell line (NCI-H187, IC50=13.0 +/- 0.2 microg/mL) but was inactive against KB, BC-1, and Vero cell lines. Combretastatin D-3 (1) showed weak antitubercular activity with a minimum inhibitory concentration (MIC) of 100.0 microg/mL, and was inactive towards the malarial parasite. Combretastatin D-4 (2) was inactive in all antitubercular, antiplasmodial, and cytotoxic assays.
authors.affiliation: Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand.
authors.forename: Namphung
authors.initials: N
authors.lastname: Vongvanich
authors.forename: Prasat
authors.initials: P
authors.lastname: Kittakoop
authors.forename: Panarat
authors.initials: P
authors.lastname: Charoenchai
authors.forename: Sutichai
authors.initials: S
authors.lastname: Intamas
authors.forename: Kannawat
authors.initials: K
authors.lastname: Danwisetkanjana
authors.forename: Yodhathai
authors.initials: Y
authors.lastname: Thebtaranonth
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D000995:Antitubercular Agents / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D001632:Bibenzyls / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D045744:Cell Line, Tumor / Q000187:drug effects; D029764:Combretaceae; D006801:Humans; D020128:Inhibitory Concentration 50; D047029:Lactams, Macrocyclic / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D008826:Microbial Sensitivity Tests; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D013267:Stilbenes / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D000995:Antitubercular Agents; D001632:Bibenzyls; D047029:Lactams, Macrocyclic; D010936:Plant Extracts; D013267:Stilbenes; C040105:combretastatin