Triterpene glycosides from Lonicera. Isolation and structural determination of seven glycosides from flower buds of Lonicera macranthoides

The structures of seven triterpene glycosides (1-7), of which the 23-O-acetyl, 28-O-beta-D-glucopyranosyl-(1 -> 6)-O-beta-D-glucopyranosyl ester of hederagenin 3-O-beta-D-glucopyranosyl-(1 -> 3)-O-alpha-L-rhamnopyranosyl-(1 -> 2)-O-alpha-L-arabinopyranoside (2) was new, from the flower buds of Lonicera macranthoides were established using chemical and NMR spectroscopic methods.