Cucurbitane-type triterpenoids from the tubers of Hemsleya dolichocarpa

Seven cucurbitane-type triterpenoids were isolated from the ethanol extract of the tubers of Hemsleya dolichocarpa, with a combination of various chromatographic approaches, including silica gel, Sephadex LH-20, Semi-HPLC and so on. On the basis of spectroscopic data analysis, they were identified as 3β,11α,26,27-tetrahydroxycucurbita-5,24(E)-diene-3,26-glucosides (1), scandenogenin D (2), jinfushanencin F (3), scandenoside R3 (4), scandenoside R₁ (5), scandenogenin A (6), scandenoside R₂ (7). Among them, compound 1 is a new triterpenoid, compound 2 showed remarkable activity against human cancer cell line HeLa with IC₅₀ value of 6.78 μmol·L^-1.