BACKGROUND: Cyclocarya paliurus, as a new food resource, is utilized extensively in human and animal diets due to its bioactive compounds, health benefits, fi ts, and its highly prized sweet fl avor. This study aimed to investigate the sweet-taste ingredient of C. paliurus leaves. RESULTS: Five new dammarane triterpenoid glycosides were isolated and identified fi ed as qingqianliutianosides A-E - E (1-5) 1 - 5 ) by comprehensive spectroscopic data analysis and a single crystal X-ray diffraction experiment. Qingqianliutianoside A (1) 1 ) and qingqianliutianoside C (3), 3 ), present in relativel...
