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).
Pyrrolidinoindoline alkaloids from Psychotria colorata / L. Verotta, T. Pilati, M. Tato, E. Elisabetsky, T. Amador, D. Nunes. - In: JOURNAL OF NATURAL PRODUCTS. - ISSN 0163-3864. - 61:3(1998), pp. 392-396. [10.1021/np9701642]
Pyrrolidinoindoline alkaloids from Psychotria colorata
L. VerottaPrimo
;
1998
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).
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