Megastigmane glycoside from Ludwigia Stolonifera

Ludwigia genus belongs to family Onagraceae, is an edible medicinal plant and is also used as a vegetable by the local people in Southwestern China. Some species of this plant, has been used as a traditional treatment for edema, nephritis, and hypertension. Phytochemical study of the CH 2 Cl 2 : MeOH (1:1) extract of the aerial parts of Ludwigia stolonifera afforded a megastigmane glycoside named, roseoside. The structure was determined by comprehensive NMR studies including DEPT, COSY, HMQC, HMBC and MS.