Chemical Constituents from the Leaves of and Their Bioactivities.

The leaves of have been consumed as Ku-Ding-Cha for clearing heat and removing toxins, and they have been used as a folk medicine for curing hypertension, diabetes, and obesity in China. The phytochemical research on the leaves of led to the isolation and identification of two new hexenol glycosides, two new butenol glycosides, and five new sugar esters, named ligurobustosides X (), X (), Y (), and Y () and ligurobustates A (), B (), C (), D (), and E (), along with seven known compounds ( and -). Compounds - were tested for their inhibitory effects on fatty acid synthase (FAS), α-glucosidase, and α-amylase, as well as their antioxidant activities.