Two new triterpenoid saponins from Lonicera macranthoides

Two new triterpenoid saponins named lonimacranthoide IV (1) and lonimacranthoide V (2) were isolated from the flower buds of Lonicera macranthoides Hand.-Mazz. (Caprifoliaceae). They have hederagenin as aglycone. Lonimacranthoide IV (1) is a rare chlorogenic acid ester acylated on the C-23 of hederagenin. Lonimacranthoide V (2) is a new sulfated triterpenoid saponin. The structures of the saponins were established by chemical and spectral methods.