title: Steroids and triterpenes from Eleocharis acutangula and E. sellowiana (Cyperaceae).
abstract: From the hexane extract of the underground parts of Eleocharis acutangula (Roxb.) Schult., lup-20(29)-ene-3beta,16beta-diol and a mixture of campesterol, stigmasterol and sitosterol were isolated. The hexane extracts of aerial and underground parts of E. sellowiana Kunth furnished two new substances, namely neohop-13(18)-en-3alpha-ol and stigmast-22-en-3beta,6beta,9alpha-triol, together with a mixture of steroids, betulinic acid, stigmast-4-en-6beta-ol-3-one and fern-9(11)-en-3alpha-ol. The molecular structures were determined by spectral analysis (1D- and 2D-NMR experiments and MS) and comparison with literature data.
authors.affiliation: Botany Department of Biology Institute, PO Box 6109, UNICAMP, Campinas 13083-970 SP, Brazil.
authors.forename: Maria do Carmo E
authors.initials: Mdo C
authors.lastname: Amaral
authors.forename: Aparecida D
authors.initials: AD
authors.lastname: Faria
authors.forename: Aderbal F
authors.initials: AF
authors.lastname: Magalhães
authors.forename: Eva G
authors.initials: EG
authors.lastname: Magalhães
authors.forename: Ana Lúcia T G
authors.initials: AL
authors.lastname: Ruiz
mesh_terms: D029785:Cyperaceae / Q000737:chemistry*; D031256:Eleocharis / Q000737:chemistry*; D006586:Hexanes / Q000032:analysis; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013256:Steroids / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D006586:Hexanes; D013256:Steroids; D014315:Triterpenes