title: New sesquiterpene hydroquinones from a Taiwanese marine sponge Polyfibrospongia australis.
abstract: Two new sesquiterpene hydroquinones, polyfibrospongols A (1) and B (2), were isolated from the Taiwanese marine sponge Polyfibrospongia australis Lendenfeld (Spongiidae) in addition to the known metabolites, dictyoceratin A (3), ilimaquinone (4), and 5-epi-ilimaquinone (9). The structures of these compounds have been determined mainly on the basis of spectral and chemical methods. Biological testing revealed that compounds 1 and 2 exhibited significant cytotoxicity against human KB-16, A-549, and murine P-388 tumor cell lines.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Shen
authors.forename: P W
authors.initials: PW
authors.lastname: Hsieh
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D006873:Hydroquinones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D051379:Mice; D011161:Porifera / Q000737:chemistry*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D006873:Hydroquinones