Flavonoids from two Lonchocarpus species of the Yucatan Peninsula
2002
Borges-Argaez, R. | Pena-Rodriguez, L.M. | Waterman, P.G.
Leaves, stem bark and root of Lonchocarpus xuul and Lonchocarpus yucatanensis were studied separately. A chalcone, 2',4-dimethoxy-6'-hydroxylonchocarpin (1), and the flavones 5,4'-dihydroxy-3'-methoxy-(6:7)-2, 2-dimethylpyranoflavone (2) and 5,4'-dimethoxy-(6:7)-2, 2-dimethylpyranoflavone (3), together with the known carpachromene (4), were isolated from the leaves of both species. Similarly, the previously reported flavans xuulanin (5) and 3beta-methoxyxuulanin (6), together with the novel 3beta,4beta,5-trimethoxy-4'-hydroxy- (6:7)-2,2-dimethylpyranoflavan (7), 3-hydroxy-4,5-dimethoxy-(6:7)-2, 2-dimethylpyranoflavan (8), and 3,4-dihydroxy-5-methoxy-(6:7)-2, 2-dimethylpyranoflavan (10), were isolated from the stem bark and root of both species. Finally, the known 2',4'-dihydroxy-3'-(3-methylbut-2-enyl) chalcone (13) was obtained from the root of L. xuul only. The structures of the various metabolites were established by interpretation of their spectroscopic data.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library