title: Sterols from Sargassum oligocystum, a brown algae from the Persian Gulf, and their bioactivity.
abstract: Sargassum oligocystum (Heterokontophyta) is one of the most abundant algae distributed in the Persian Gulf. In this study, the cytotoxic effects of this algae on brine shrimp larvae were evaluated and the main sterols of the algae identified. Separation and purification of the compounds was carried out using silica gel column chromatography and HPLC to obtain eight pure compounds, 1-8. Structural elucidation of the constituents was based on the data obtained from (1)H-NMR, (13)C-NMR, HSQC, HMBC, DEPT and EI-MS. The compounds separated from S. oligocystum were identified as 22-dehydrocholesterol (1), cholesterol (2), fucosterol (3), 29-hydroperoxystigmasta-5,24(28)-dien-3β-ol (4), 24-hydroperoxy-24-vinylcholesterol (5), a mixture of 24(S)-hydroxy-24-vinylcholesterol (6) and 24(R)-hydroxy-24-vinylcholesterol (7), and ostreasterol (8) based on their spectral data and from comparison with those previously reported in the literature.
authors: Department of Marine Science and Technology, Science and Research, Islamic Azad University, Tehran, Iran.
authors: Parisa
authors: P
authors: Permeh
authors: Soodabeh
authors: S
authors: Saeidnia
authors: Ali
authors: A
authors: Mashinchian-Moradi
authors: Ahmad R
authors: AR
authors: Gohari
mesh_terms: D000818:Animals; D001156:Artemia; D019156:Indian Ocean; D007814:Larva; D015394:Molecular Structure; D044647:Sargassum / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D018675:Toxicity Tests
chemical_list: D013261:Sterols