title: New sesquiterpene hydroquinones from a Taiwanese marine sponge, Hippospongia metachromia.
abstract: In addition to metachromins A (1), B (2), and E (9), two new sesquiterpene hydroquinones, hippochromins A and B (3, 4), were isolated from the Taiwanese marine sponge Hippospongia metachromia. The structures of 4--6 were established by extensive 2D NMR analysis. Metachromins A (1) and B (2), hippochromin A diacetate (5), and metachromin B monoacetate (8) exhibited potent cytotoxicities against human colon (COLO-205) and nasopharyngeal (KB) tumor cells, while compounds 6, 7, and 9 were inactive.
authors: Institute of Marine Resources, National Sun Yat-sen University, 70 Lien-Hai Road, Kaohsiung, Taiwan, Republic of China. ycshen@mail.nsysu.edu.tw
authors: Y C
authors: YC
authors: Shen
authors: C Y
authors: CY
authors: Chen
authors: Y H
authors: YH
authors: Kuo
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D011161:Porifera / Q000737:chemistry*; D011809:Quinones / Q000737:chemistry* / Q000494:pharmacology*; D012717:Sesquiterpenes / Q000737:chemistry* / Q000494:pharmacology*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013624:Taiwan; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D011809:Quinones; D012717:Sesquiterpenes; C433605:metachromin A; C433603:metachromin B; C433604:metachromin E