Isolation and structure identification of flavonol glycoside from Lysimachia christinae Hance.

AimTo isolate and prepare chemical standards. MethodsFlavonol glycoside and rhamnonic acid γ-lactone were isolated from whole plants of Lysimachia christinae Hance. with 95% ethanol and purified by silica gel column chromatography. UV, IR, MS, ¹HNMR, ¹³CNMR, DEPT, HMQC, HMBC were used for the structural identification. ResultsTwo compounds were obtained. They were identified as rhamnonic acid γ-lactone (I) and kaempferol-3-O-α-L-rhamnosyl (1→2)-β-D-xyloside (II). ConclusionCompound I was isolated from this genus for the first time. Compound II is a new compound named as lysimachiin.