Tuberosin, a new pterocarpan isolated from Pueraria tuberosa DC. has been identified as 6a,13a-dihydro-10,10-dimethyl-6H,10H-furo[3,2-c:4,5-g′]bis[1]benzopyran-3,6a-diol (III). 7-Methoxy-6-(7-methoxychrornan-3-yl)-2,2-dimethylchroman (X) has been synthesized and shown to be identical with a degradation product from tuberosin.
B. S. Joshi and V. N. Kamat, J. Chem. Soc., Perkin Trans. 1, 1973, 907 DOI: 10.1039/P19730000907
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