Sulfur-containing polybromoindoles from the Formosan red alga Laurencia brongniartii.
Five new sulfur-containing polybromoindoles, 2-methylsulfinyl-3-methylthio-4,5,6-tribromoindole (1), 3-methylsulfinyl-2,4,6-tribromoindole (2), 4,6-dibromo-2,3-di(methylsulfinyl)indole (3), 3,3'-bis(2'-methylsulfinyl-2-methylthio-4,6,4',6'-tetrabromo)indole (4), and 3,3-bis(4,6-dibromo-2-methylsulfinyl)indole (5), as well as seven known sulfur-containing polybromoindoles, 3-methylthio-2,4,6-tribromoindole (6), 3-methylthio-2,4,5,6-tetrabromoindole (7), 4,6-dibromo-2,3-di(methylthio)indole (8), 2,3-di(methylthio)-4,5,6-tribromoindole (9), 4,6-dibromo-2-methylsulfinyl-3-(methylthio)indole (10), 4,6-dibromo-2-(methylthio)indole (11), and 3,3-bis(4,6-dibromo-2-methylthio)indole (12), have been isolated from the Formosan red alga Laurencia brongniartii. The structures were elucidated by extensive spectral analysis, and their cytotoxicity against selected cancer cells was measured in vitro.
El-Gamal
Ali A
AA
Department of Marine Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Wang
Wei-Lung
WL
Duh
Chang-Yih
CY
D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006842:Hydrocarbons, Brominated / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007211:Indoles / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D044722:Laurencia / Q000737:chemistry*; D015394:Molecular Structure; D013455:Sulfur / Q000737:chemistry*; D013624:Taiwan; D014407:Tumor Cells, Cultured
D000970:Antineoplastic Agents; D006842:Hydrocarbons, Brominated; D007211:Indoles; D013455:Sulfur; C030374:indole