Three new triterpenoids from Salacia hainanensis Chun et How showed effective anti-α-glucosidase activity

► We studied the constituents with hypoglycemic activity in Salacia hainanensis. ► With bioassay-guided method, we focused on the bioactive EtOAc part. ► In this part, three new and three known triterpenoids were obtained. ► These compounds inhibited α-glucosidase activity more strongly than acarbose.