PARTE UTILIZADA= Used part: Hoja y corteza.

ACCION FARMACOLOGICA= Pharmacological action: Refrescante y laxante.

COMPOSICIÓN QUÍMICA= Chemical composition: From M. coccinea (Gesneriaceae), five strongly bitter labdane glycosides named mitrariosides A1, A2, B, C and D were obtained. The structures were deduced by chem. and spectroscopic evidence (COSY, 13C-1H CORR, NOESY and MS-FAB) and found to be mitrarioside A1 (I, (6S)-19-(beta-D-galactopyranosyloxy)-6-hydroxy-15-(alpha-L-rhamnopyranosyloxy)labda-8(17),13-diene), mitrarioside A2 (II, (6S)-19-(beta-D-glucopyranosyloxy)-6-hydroxy-15-(alpha-L-rhamnopyranosyloxy)labda-8(17,13-diene), mitrarioside B (III, (6S)-19-(beta-D-glucopyranosyloxy)-6-hydroxy-15-(alpha-D-glucopyranosyloxy)labda-8(17),13-diene), mitrarioside C (IV, (6S)-19-(beta-D-glucopyranosyloxy)-6,15-dihydroxylabda-8(17),13-diene), and mitrarioside D (V, (6S)-19-(alpha-L-rhamnopyranosyloxy)-6,15-dihydroxylabda-8(17),13-diene). The known compds. acteoside and calceolarioside C were also isolated.

ZONA GEOGRAFICA= Geografical zone: S. de Chile y Argentina. 

1) TOURSARKISSIAN, Martín. Plantas medicinales de Argentina : sus nombres botánicos, vulgares, usos y distribución geográfica. Buenos Aires : Hemisferio Sur,1980, p.56.

2) CARDENAS, Luz Clarena, et al. Mitrariosides, five bitter labdane glycosides from Mitraria coccinea (Gesneriaceae). Liebigs Annalen der Chemie. 1992, vol.7, p.665-668.