title: Pyrrolidinoindoline Alkaloids from Psychotria colorata1
abstract: Fractionation of an alkaloid extract of Psychotria colorata flowers led to the isolation of six alkaloids, identified by UV, 1D and 2D NMR, and MS as (-)-calycanthine, isocalycanthine, (+)-chimonanthine, hodgkinsine, quadrigemine C, and a new alkaloid (1), whose structure was deduced by X-ray analysis to be (8-8a),(8'-8'a)-tetradehydroisocalycanthine 3a(R), 3'a(R).
authors.affiliation: Dipartimento di Chimica Organica e Industriale, Università degli Studi, via Venezian 21, 20133 Milano, Italy, Centro per lo Studio delle Relazioni tra Struttura e Reattività Chimica del CNR, via Golgi 19, 20133 Milano, Italy, Structure Based Drug Design, Pharmacia & Upjohn, via Pasteur 10, 20014 Nerviano (MI), Italy, Departamento de Farmacologia, Universidade Federal do Rio Grande do Sul, CP 5072, Porto Alegre (RS), Brazil, and Curso de Pós-Graduação en Química, Universidade Federal do Parà, Belém (PA), Brazil.
authors.initials: L
authors.lastname: Verotta
authors.initials: T
authors.lastname: Pilati
authors.initials: M
authors.lastname: Tatò
authors.initials: E
authors.lastname: Elisabetsky
authors.initials: TA
authors.lastname: Amador
authors.initials: DS
authors.lastname: Nunes