title: Sterols isolated from Tubifex tubifex.
abstract: Four 3beta-hydroxysterols isolated from chloroform extract from Tubifex tubifex were shown to have the structures stigmast-23-en-3-ol, stigmast-7,14-dien-3-ol, 22-dehydrocholesterol, and 24 methylenecholesterol based on spectroscopic methods. Stigmasterol and beta-sitosterol were also investigated on the basis of mass spectral analyses and compared with known compounds.
authors.affiliation: Laboratorio de Investigación de Productos Naturales, Escuela Superior de Ingeniería Química e Industrias extractivas IPN, Punto fijo 16, col. Torres Lindavista cp 07708, México DF, México. rmpg@prodigy.net.mx
authors.forename: Rosa Martha
authors.initials: RM
authors.lastname: Perez Gutierrez
authors.forename: Ivan Cordova
authors.initials: IC
authors.lastname: Reyes
mesh_terms: D000818:Animals; D002784:Cholesterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D019906:Nuclear Magnetic Resonance, Biomolecular; D009835:Oligochaeta / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013265:Stigmasterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D002784:Cholesterol; D013265:Stigmasterol