title: Cytotoxic chalcones and flavanones from the tree bark of Cryptocarya costata.
abstract: A new flavanone, 7-hydroxy-5,6-dimethoxyflavanone (1), together with three other flavonoids, didymocarpin (2), 2',4'-dihydroxy-5',6'-dimethoxychalcone (3), and isodidymocarpin (4), had been isolated from the methanol extract of the tree bark of Cryptocarya costata. The structures of these compounds were determined based on spectral evidence, including UV, IR, 1-D and 2-D NMR, and mass spectra. Cytotoxic properties of compounds 1-4 were evaluated against murine leukemia P-388 cells. The chalcones 3 and 4 were found to have substantial cytotoxicity with IC50 of 5.7 and 11.1 microM, respectively.
authors.affiliation: Chemistry Department, Hasanuddin University, Jalan Perintis Kemerdekaan, Makassar, Indonesia.
authors.forename: Hanapi
authors.initials: H
authors.lastname: Usman
authors.forename: Euis H
authors.initials: EH
authors.lastname: Hakim
authors.forename: Tjodi
authors.initials: T
authors.lastname: Harlim
authors.forename: Muhammad N
authors.initials: MN
authors.lastname: Jalaluddin
authors.forename: Yana M
authors.initials: YM
authors.lastname: Syah
authors.forename: Sjamsul A
authors.initials: SA
authors.lastname: Achmad
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Takayama
mesh_terms: D000818:Animals; D002470:Cell Survival / Q000187:drug effects; D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D031369:Cryptocarya / Q000737:chemistry*; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D007941:Leukemia P388; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008958:Models, Molecular; D018547:Plant Stems / Q000737:chemistry*; D014197:Trees / Q000737:chemistry*
chemical_list: D047188:Chalcones; D044950:Flavanones