Montanoa hibiscifolia

In addition to these observations, the 16-a-hydroxy-e /-kauran-19-oic acid, isolated from Montanoa hibiscifolia, and its methyl ester inhibited spontaneous oxytocin- and potassium-induced contractile activities. The methyl ester inhibition was much stronger, 2-15 times more than the acid at pM concentrations. This... 

PONCE-MONTER, H., CAMPOS-LARA, G., PEDRON, N., DE LA TORRE, L., VILLANUEVA, T., GALLEGOS, A., ROMO DE VIVAR, A., AZPEITIA, E., PEREZ, A.J., The zoapatle. XV. Activity of 16 alpha-hydroxy-ent-kauran-19-oic acid isolated from Montanoa hibiscifolia, and its methyl ester on rat and guinea pig uterus., J. Ethnopharmacol., 1988, 24, 127-134. 

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See also in sourсe #XX -- [ ]

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