Millettia pendula

Tentative struct. Isol. from heartwood of Millettia pendula. Hayashi, Y. et al, Mokuzai Gakkaishi, 1978, 24, 898 CA, 90,... 

While flavans are quite rare in nature, the isomeric isoflavans are more numerous (there are 39 of them), and they occur fairly widely, at least in members of the Leguminosae. Isoflavans are optically active and compounds with both the R-and 5- configuration at C-3 have been described. Two typical isoflavans are equol (49) which occurs in the heartwood of Millettia pendula but is better known as a urinary metabolite in mammals of the isoflavone formononetin (109) and (-)-duartin (50) present in the heartwood of several Machaerium species. Isoflavans (and pterocarpans) occur in a different context than wood chemistry in the... 

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See also in sourсe #XX -- [ ]

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