title: The structural determination of a new steroidal metabolite from the brown alga Sargassum asperifolium.
abstract: An investigation of the natural products chemistry of the brown alga Sargassum asperifolium from the red sea yielded a new steroidal metabolite, 24-vinyl cholest-4-ene-24-ol-3-one, saringosterone (3), a known steroidal metabolite, 24-vinyl cholest-5-ene-3b,24-diol, saringosterol (4), and known diterpene with a hydroazulene skeleton, dictyone (1). The identification of the isolated metabolites was established mainly by spectral methods and chemical transformation of the dictyone (1) to its acetate (2).
authors.affiliation: Department of Chemistry, Dammietta Faculty of Science, Mansoura University, New Dammietta P. O. 34517, Egypt. snayyad@mans.edu.eg
authors.forename: Seif-Eldin N
authors.initials: SE
authors.lastname: Ayyad
authors.forename: Salah Z A
authors.initials: SZ
authors.lastname: Sowellim
authors.forename: Mohamed S
authors.initials: MS
authors.lastname: el-Hosini
authors.forename: Amal
authors.initials: A
authors.lastname: Abo-Atia
mesh_terms: D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification; D000459:Phaeophyceae / Q000737:chemistry* / Q000378:metabolism; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification; D013265:Stigmasterol / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004224:Diterpenes; D013256:Steroids; C442582:saringosterol; C478022:saringosterone; D013265:Stigmasterol