Uma nova lignana e outros constituintes químicos de Hypenia salzmannii (Benth.) Harley (Lamiaceae)

Abstract

The Lamiaceae family composes aproximately 260 genera and 7.193 species, occurring as herbs, shrubs and trees, distributed in both hemispheres. It includes a large number of medicinal plants of significative importance. In Brazil, occurs about 26 genera and 350 species. The Hypenia (Mart. ex Benth) R. Harley genus presents a restrict distribution in South America with approximately 27 species distributed in some regions of Venezuela, Paraguai, Bolívia and southern Brazil. Among these species, Hypenia salzmannii is popularly known as canela-de-urubu . The population uses this plant for the treatment of respiratory illnesses such as colds, flu and other respiratory diseases in general. This work describes the results of the phytochemical study of Hypenia salzmannii. The plant was subjected to extraction, partition and chromatographic processes for chemical constituents isolation. Their chemical structure were determined by spectroscopic methods of InfraRed (IR) and 1H e 13C NMR, uni and bidimensional, mass spectrometry and comparisons with literature data. From the dichloromethane extract were isolated three terpenoids: ursolic acid, oleanoic acid and betulinic acid; a steroid: β-sitosterol glycoside; two flavanones: isosakuranetin and sakuranetin; two lignans: hinoquinin and β-peltatin-A-methylether. From the ethyl acetate extract were obtained a flavonoid glycoside: hyperin; two phenolic derivatives: rosmarinic acid and methyl rosmarinate; and a novel lignan, (-)-secoisolaricirenisol-9-O-β-D-glucopiranoside-(6 -p-cumaroyl). The results from this work contributed to the phytochemical and chemotaxonomic knowledge of Hypenia salzmannii (Benth.) Harley, the Hypenia genus and Lamiaceae family as well.