Objective To isolate and identify the components from the stem barks of Morus yunnanensis.Methods The compounds were isolated and purified by silic gel column,Sephadex LH-20,and RP-18 chromatography.Their chemical structures were elucidated on the basis of physicochemical properties and spectral data.Results Eleven compounds were isolated and identified as:mulberroside C(1),oxyresveratrol(2),2',4',7-trihydroxy-(2S)-flavone(3),norartocarpetin(4),moracin P(5),betulinic acid(6),sitosteryl 3?-glucoside 6'-O-palmitate(7),lupeol(8),betulinic acid(9),?-daucosterol(10),and ?-sitosterol(11).Conclusion All the compounds are isolated from the plant for the first time,and compound 9 shows cytotoxic activities.

OBJECTIVETo isolate and identify the Diels-Alder type adducts from stem barks of Morus yunanensis.

METHODThe compounds were isolated and purified by silicagel, Sephadex LH-20 and RP-18 colum chromatography. Their chemical structures were elucidated on the basis ofphysicochemical properties and spectral data.

RESULTNine compounds were isolated and identified as: kuwanon G (1), sanggenol M (2), mulberrofuran J (3), guangsangon B (4), resveratrol (5), kuwanon X (6), kuwanon P (7), mulberrofuran O (8), mulberrofuran Q (9).

CONCLUSIONAll the compounds are isolated from the plant for the first time, and compounds 4, 5 have anti-inflammation activities with inhibitory ratios of 57.3%, 50.5% respectively at a concentration of 10 microg mL(-1).

Anti-Inflammatory Agents ; pharmacology ; Antioxidants ; pharmacology ; Drugs, Chinese Herbal ; Flavonoids ; analysis ; Morus ; chemistry ; Plant Bark ; chemistry ; Plant Extracts ; pharmacology ; Plant Stems ; chemistry ; Stilbenes ; analysis