title: Psychollatine, a glucosidic monoterpene indole alkaloid from Psychotria umbellata.
abstract: A monoterpene indole alkaloid, psychollatine ( 1), was isolated from Psychotria umbellata leaves. Its structure was characterized by interpretation of spectroscopic data and by comparison of its NMR data with those of croceaine A ( 2) from Palicourea crocea. The configuration of psychollatine ( 1) was established by NOE difference and circular dichroism (CD) techniques, while its conformation was evaluated through molecular modeling studies and NMR coupling constants.
authors.affiliation: Faculdade de Farmácia, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Ipiranga, 2752, Porto Alegre, 90610-000, Brazil.
authors.forename: V A
authors.initials: VA
authors.lastname: Kerber
authors.forename: C S
authors.initials: CS
authors.lastname: Passos
authors.forename: H
authors.initials: H
authors.lastname: Verli
authors.forename: A G
authors.initials: AG
authors.lastname: Fett-Neto
authors.forename: J P
authors.initials: JP
authors.lastname: Quirion
authors.forename: A T
authors.initials: AT
authors.lastname: Henriques
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D001938:Brazil; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D026121:Indole Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D032069:Psychotria / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D006027:Glycosides; D026121:Indole Alkaloids; C499739:psychollatine