Dysoverines G-K from the rhizome of Dysosma tonkinense and their cytotoxic activity.
Phytochemical investigation of the 70% ethanol extract of Dysosma tonkinense rhizomes (Berberidaceae) led to the isolation of five new biflavonoids, dysoverines G-K (2-6), together with one known compound (dysoverine A, 1). The structures of the isolated compounds were elucidated by comprehensive spectroscopic analyses...