Abstract
Two new homoisoflavonoids, ( ± )-5,7-dihydroxy-8-methyl-3-(2′,4′-dihydroxybenzyl) chroman-4-one (1) and ( ± )-5,7-dihydroxy-6,8-dimethyl-3-(2′,4′-dihydroxybenzyl) chroman-4-one (2), along with two known homoisoflavonoids, 5,7-dihydroxy-6-methyl-3-(2′,4′-dihydroxybenzyl)chroman-4-one (3) and disporopsin (4), were isolated from the EtOAc extract of traditional Chinese medicine – “Gan Luo Xin.” Their structures were determined on the basis of spectroscopic analysis (UV, IR, HR-ESI-MS, 1D NMR, and 2D NMR).
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Acknowledgment
The authors acknowledge the financial support from National S&T Planed Projects of China (grant no. 2011DFA32920).