Three lignans and one coumarinolignoid with quinone reductase activity from Eurycorymbus cavaleriei

Four compounds, including one new lignan cavaol H (1), one new coumarinolignoid 5′-hydroxycleomiscosin B (4) and two known lignans (2-3) were isolated from the 95% ethanol extract of the twigs of Eurycorymbus cavaleriei. The structures were elucidated on the basis of the results of spectroscopic analysis, mainly NMR and MS. And quinone reductase activities were assayed.