Title

Additional flavonoids from Lonchocarpus yucatanensis and L. xuul

Document Type

Article

Publication details

Borges-Argaez, R, Poot Diaz, ME, Waterman, PG & Pena-Rodriguez, LM 2005, 'Additional flavonoids from Lonchocarpus yucatanensis and L. xuul', Journal of the Brazilian Chemical Society, vol. 16, no. 5, pp. 1078-1081.

The publisher's version of this article is available at http://jbcs.sbq.org.br/jbcs/2005/vol16_n5/index.htm

Peer Reviewed

Peer-Reviewed

Abstract

Duas novas flavanonas naturais, 5-hidroxi-6,7-(2”,2”-dimetilcromeno)flavanone (1) e 5-metoxi- 3-hidroxi-6,7-(2”,2”-dimetilcromeno)flavanone (2), foram isoladas dos extratos das raízes de L. yucatanensis e L. xuul, respectivamente. Adicionalmente, quatro novos metabólitos, os flavanóides glicosídicos quercetina-3-ramnoglucosídeo e caempferol-3-ramnoglucosídeo, juntamente com 4- hidroxi-N-metil-prolina, e o éster metílico do ácido p-cumárico, foram isolados pela primeira vez das folhas de L. xuul. Os metabólitos foram identificados usando os dados espectroscópicos obtidos e pela comparação desses com aqueles encontrados na literatura. Two new natural flavanones, 5-hydroxy-6,7-(2”,2”-dimethylchromene)flavanone (1) and 5- methoxy-3-hydroxy-6,7-(2”,2”-dimethylchromene)flavanone (2), were isolated from the root extracts of L. yucatanensis and L. xuul, respectively. Additionally, four known metabolites, the glycosidic flavonoids quercetin-3-rhamnoglucoside and kaempferol-3-rhamnoglucoside, together with 4- hydroxy-N-methyl-proline, and p-coumaric acid methyl ester, were isolated for the first time from the leaves of L. xuul. The various metabolites were identified on the basis of their spectroscopic data and by comparison with those reported in the literature.