title: Anthracene derivatives from Auxemma oncocalyx.
abstract: Three anthracene derivatives, auxenone, oncocalyxonol and auxemim, were isolated from Auxemma ontocalyx. The structures of these compounds as 1,4,8-trihydroxy-2-methoxy-5-methyl-9,10-anthraquinone, rel-9alpha,11alpha-epoxy-1,4,8alpha,11alpha-tetrahydroxy-2-methoxy-8a beta-methyl-5,6,7,8,8a,9, 10,10a beta-octahydro-10-anthracenone and rel-8alpha,11beta-epoxy-2,11-dimethoxy-8a beta-methyl-5,6,7,8,8a,9-hexahydro-1,4-anthracenedione were determined by analysis of spectral data (1D and 2D NMR, IR, HREIMS and UV).
authors.affiliation: Departamento de Química Orgánica e Inorgânica, Universidade Federal do Ceará, Fortaleza, Brazil.
authors.forename: W B
authors.initials: WB
authors.lastname: Marques
authors.forename: H S
authors.initials: HS
authors.lastname: dos Santos
authors.forename: O D
authors.initials: OD
authors.lastname: Pessoa
authors.forename: R
authors.initials: R
authors.lastname: Braz-Filho
authors.forename: T L
authors.initials: TL
authors.lastname: Lemos
mesh_terms: D000873:Anthracenes / Q000737:chemistry / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D013057:Spectrum Analysis
chemical_list: D000873:Anthracenes