O estudo fitoquímico de Mikania hoehnei conduziu ao isolamento e à identificação de acetato de lupeol, estigmasterol, b-sitosterol, campesterol, 3-O-b-D-glicopiranosil estigmasterol, 3-O-b-D-glicopiranosil sitosterol, 2,6-dimetoxibenzoato de benzila, luteolina, caempferol e duas lactonas sesquiterpênicas diidrocostuslactona e 8b-hidroxizaluzanina D. Estas substâncias foram identificadas com base na análise dos espectros de IV, EM e RMN de ¹H e 13C e os dados foram comparados com os descritos na literatura.

Phytochemical study of Mikania hoehnei yielded lupeyl acetate, stigmasterol, b-sitosterol, campesterol, b-sitosteryl glucopyranoside, stigmasteryl glucopyranoside, benzil 2,6-dimethoxybenzoate, luteolin, kaempferol and two sesquiterpene lactones: dehydrocostuslactone and 8b-hydroxyzaluzanin D. IR, ¹H and 13C NMR and MS spectroscopic analyses and comparisons with previously reported data were used for the identification of these compounds.

Dichloromethane crude extract from xylopodium of Calea uniflora Less (Heliantheae-Asteraceae) showed in vitro trypanocidal activity against trypomastigote forms of Trypanosoma cruzi. The data obtained allow to conclude that the crude extract must be investigate to identify its active compounds.

O estudo fitoquímico de Mikania stipulacea conduziu ao isolamento e à identificação de lupeol, alfa-amirina, estigmasterol, beta-sitosterol, campesterol, 3-O-beta-D-glicopiranosil estigmasterol, 3-O-beta-D-glicopiranosil sitosterol, da cumarina isoescopoletina e dos ácidos vanílico, cinamoilgrandiflórico e ent-caurenóico, juntamente com dois diterpenos novos, os ácidos ent-9alfa-hidroxi-15beta-E-cinamoiloxi-16-cauren-19-óico e ent-9alfa-hidroxi-15beta-Z-cinamoiloxi-16-cauren-19-óico. Estas substâncias foram identificadas com base na análise dos espectros de IV, EM e RMN de ¹H e 13C.

Phytochemical study of Mikania stipulacea yielded lupeol, alpha-amyrin, stigmasterol, beta-sitosterol, campesterol, beta-sitosteryl glucopyranoside, stigmasteryl glucopyranoside, the coumarin isoscopoletin, and vanillic, cinnamoylgrandifloric and ent-kaurenoic acids, besides two new diterpene acids: ent-9alpha-hydroxy-15beta-E-cinnamoyloxy-16-kauren-19-oic and ent-9alpha-hydroxy-15beta-Z-cinnamoyloxy-16-kauren-19-oic. IR, ¹H and 13C NMR and MS spectroscopic analyses were used for the identification of these compounds.