Dihydrochalcones, coumarins and alkaloids from Metrodorea nigra |
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Authors: | Adolfo H Mü ller Paulo C Vieira M F tima das GFda Silva and Jo o B Fernandes |
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Institution: | a Departamento de Química, Universidade Federal do Pará, Campus Universitário, 66075-900, Belém, PA, Brazil b Departamento de Química, Universidade Federal de São Carlos, CP 676, 13565-905 São, Carlos, SP, Brazil |
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Abstract: | Two novel dihydrochalcones, 2′,3,4′,6′-tetrahydroxy-4-methoxy-3′,5-di-(3,3-dimethylallyl)-dihydrochalcone and 2′,.3,6′-trihydroxy-4-methoxy-5-(3,3-dimethylallyl)-3′,4′-(2″,2″-dimethyldihydropyran)-dihydrochalcone, have been isolated from fresh fruits of Metrodorea nigra. Stems and leaves showed a similar composition and we have isolated common steroids, simple coumarins, several furocoumarins, furoquinoline alkaloids and a furofuran lignan. From stems, we have also isolated the pentacyclic 6-C-monoterpenyl-5,7-dioxycoumarin, deoxybruceol. Structures of the isolated compounds were elucidated on the basis of spectral data. |
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