title: Xenicane-type diterpenes with cytotoxicity from Xenia florida.
abstract: Chromatographic investigation of an acetone extract of the octocoral Xenia florida afforded three new xenicane diterpenes, namely, florxenilide A (1), florxenilide B (2), and florxenilide C (3), in addition to seven known xenicane diterpenes and two known cadinene sesquiterpenes. Structures were elucidated through spectroscopic analysis, especially 2D NMR, and chemical derivatization. The absolute configuration of 1 was determined by NOESY, CD, and Mosher's methods. Florxenilides A (1) and B (2) exhibited cytotoxicity against human colon cancer (WiDr) cells at 4.5 and 3.7 muM, respectively.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, 70 Lien-Hai Road, Kaohsiung, Taiwan 80424, Republic of China.
authors.forename: Yuan-Bin
authors.initials: YB
authors.lastname: Cheng
authors.forename: Jiun-Yang
authors.initials: JY
authors.lastname: Jang
authors.forename: Ashraf Taha
authors.initials: AT
authors.lastname: Khalil
authors.forename: Yao-Haur
authors.initials: YH
authors.lastname: Kuo
authors.forename: Ya-Ching
authors.initials: YC
authors.lastname: Shen
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification / Q000494:pharmacology; D004224:Diterpenes / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification / Q000494:pharmacology; D013624:Taiwan; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004224:Diterpenes; D012717:Sesquiterpenes; C511028:florxenilide A; C511029:florxenilide B; C511030:florxenilide C