title: Halogenated terpenes and a C(15)-acetogenin from the marine red alga Laurencia saitoi.
abstract: Seven parguerane diterpenes: 15-bromo-2,7,19-triacetoxyparguer-9(11)-en-16-ol (1), 15-bromo-2,7,16,19-tetraacetoxyparguer-9(11)-ene (2), 15-bromo-2,19-diacetoxyparguer-9(11)-en-7,16-diol (3), 15-bromo-2,16,19-triacetoxyparguer-9(11)-en-7-ol (4), 15-bromo-2,16-diacetoxyparguer-9(11)-en-7-ol (5), 15-bromoparguer-9(11)-en-16-ol (6), 15-bromoparguer-7-en-16-ol (7), two polyether triterpenes: thyrsiferol (8) and thyrsiferyl 23-acetate (9), and one C(15)-acetogenin, neolaurallene (10), were isolated from a sample of marine red alga Laurencia saitoi collected off the coast of Yantai. Their structures were established by detailed NMR spectroscopic analysis and comparison with literature data.
authors.affiliation: Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai, PR China. nyji@yic.ac.cn
authors.forename: Nai-Yun
authors.initials: NY
authors.lastname: Ji
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Li
authors.forename: Bin-Gui
authors.initials: BG
authors.lastname: Wang
mesh_terms: D054378:Acetogenins / Q000737:chemistry* / Q000302:isolation & purification*; D006219:Halogens / Q000737:chemistry* / Q000302:isolation & purification*; D044722:Laurencia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D054378:Acetogenins; D006219:Halogens; D013729:Terpenes