title: Two new xeniolides from a Taiwanese Xenia soft coral.
abstract: Chromatographic investigation of an extract of the octocoral Xenia umbellata afforded two new diterpenes, xenibelatols A (1) and B (2), in addition to three known xenicane diterpenes, 7,8-oxidoisoxeniolide (3), 9-hydroxyxeniolide F (4), and florlide C, and a cadinene sesquiterpene, xenitorin A (5). The structures were elucidated through spectroscopic analysis, especially 2D NMR.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, Taiwan 80424 P.R, China. ycshen@mail.nsysu.edu.tw
authors.forename: Ya-Ching
authors.initials: YC
authors.lastname: Shen
authors.forename: Yu-Hui
authors.initials: YH
authors.lastname: Chen
authors.forename: Yuan-Bin
authors.initials: YB
authors.lastname: Cheng
authors.forename: Yao Haur
authors.initials: YH
authors.lastname: Kuo
authors.forename: Ashraf Taha
authors.initials: AT
authors.lastname: Khalil
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D003603:Cytotoxins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006367:HeLa Cells; D006801:Humans; D008968:Molecular Conformation; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013624:Taiwan
chemical_list: D003603:Cytotoxins; D004224:Diterpenes