Hemecitones A and B: two phenanthrenes with cytotoxicity from Hemerocallis fulva (L.) L.

Two new phenanthrenes, Hemecitones A and B, were isolated from Hemerocallis fulva (L.) L. Their structures were determined by UV, IR, HR-ESI-MS, 1D and 2D NMR analysis. The in vitro cytotoxic activ...