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Oxygenated pyrenes, their potential biosynthetic precursor and benzylated dihydroflavones from two African Uvaria species


, : Oxygenated pyrenes, their potential biosynthetic precursor and benzylated dihydroflavones from two African Uvaria species. Phytochemistry (Oxford) 44(2): 359-364

Two new oxygenated pyrenes, 2,7-dihydroxy-1,8-dimethoxypyrene and 2-hydroxy-1,7,8-trimethoxypyrene, have been isolated, from the stem bark of Tanzanian Uvaria lucida spp. lucida, along with the benzylated dihydroflavones chamanetin, isochamanetin, dichamanetin, uvarinol and isouvarinol, and the carotenoid lutein. 2,7-Dihydroxy-1,8-dimethoxypyrene was also isolated from Ghanaian U. doeringii, together with a potential biogenetic precursor of the pyrenes, 1,2-dihydro-2,9-dihydroxy-10-methoxy-furo(2,3-a)phenanthrene, and most of the benzylated flavanones, which were found in U. lucida spp. lucida.

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Accession: 002914217

DOI: 10.1016/s0031-9422(96)00448-7

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