Isoflavones from Placolobium Vietnamense, an indigenous plant of Vietnam

Their structures were established by means of physical data (ESI MS, 1D and 2D NMR) and evaluated for the cytotoxic activities against liver hepatocellular carcinoma (HepG2), human lung cancer (NCI-H460), human epithelial carcinoma (HeLa) and human breast cancer (MCF-7) cell lines. This is the first report on phytochemical studies of this plant.