title: Antitubercular sesterterpenes from the Thai sponge Brachiaster sp.
abstract: A new scalarane-type sesterterpene, 12-deacetoxyscalarin 19-acetate (2), and two naturally new derivatives of manoalide-type sesterterpenes, (E)- and (Z)-neomanoalide 24,25-diacetates (3 and 4), were isolated from the Thai sponge Brachiaster sp., along with five other known sesterterpenes: heteronemin (1), heteronemin acetate (5), 12-epi-19-deoxyscalarin (6), 12-deacetyl-12-epi-19-deoxyscalarin (7), and manoalide 25-acetate (8). The antitubercular and cytotoxic activities of all eight compounds were evaluated to reveal the potent activity of compounds 1, 2, 5, and 8. Among these, compound 2 showed an interesting bioactivity profile, in possessing potent antitubercular activity and being practically inactive in the cytotoxicity bioassay.
authors.affiliation: Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand.
authors.forename: Saeng-ngam
authors.initials: SN
authors.lastname: Wonganuchitmeta
authors.forename: Supreeya
authors.initials: S
authors.lastname: Yuenyongsawad
authors.forename: Niwat
authors.initials: N
authors.lastname: Keawpradub
authors.forename: Anuchit
authors.initials: A
authors.lastname: Plubrukarn
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*; D054830:Sesterterpenes; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013785:Thailand; D014407:Tumor Cells, Cultured
chemical_list: C493750:12-deacetoxyscalarin 19-acetate; D000970:Antineoplastic Agents; D000995:Antitubercular Agents; D054830:Sesterterpenes; D013729:Terpenes; C493748:heteronemin