title: Sesquiterpenoids and artificial 19-oxygenated steroids from the formosan soft coral Nephthea erecta.
abstract: Chemical investigations on the acetone and MeOH solubles of the soft coral Nephthea erecta have afforded five new sesquiterpenoids (1-5), one known sesquiterpene, kelsoene (6), and two known 19-oxygenated steroids (10 and 11). In addition, three unexpected artificial 19-oxygenated steroids (7-9) were obtained by letting 10 and 11 stand in CDCl(3) for prolonged periods of time. The structures of 1-9 were elucidated by extensive spectroscopic analyses, and their cytotoxicity against selected cancer cells was measured in vitro.
authors.affiliation: Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China.
authors.forename: Shi-Yie
authors.initials: SY
authors.lastname: Cheng
authors.forename: Chang-Feng
authors.initials: CF
authors.lastname: Dai
authors.forename: Chang-Yih
authors.initials: CY
authors.lastname: Duh
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013624:Taiwan
chemical_list: D000970:Antineoplastic Agents; D012717:Sesquiterpenes; D013256:Steroids