A New Flavonol Triglycoside from the Leaves of Bergera koenigii

A new flavonol triglycoside, 4ʹ‐ O ‐ β ‐glucopyranosyl‐isorhamnetin 3‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐galactopyranoside (or bergeroside, ( 1 ) together with isorhamnetin 3‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐galactopyranoside ( 2 ), isorhamnetin 3‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→2)‐[ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐galactopyranoside] ( 3 ), kaempferol 3‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐galactopyranoside ( 4 ), kaempferol 3‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→2)‐[ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐galactopyranoside] ( 5 ), benzyl β ‐ d ‐glucopyranoside ( 6 ), eugenol rutinoside ( 7 ), 4‐ E ‐propenyl‐phenol‐1‐ O ‐ α ‐ l ‐rhamnopyranosyl‐(1→6)‐ β ‐ d ‐glucopyranoside ( 8 ), and icariside B 1 ( 9 ) were isolated from the leaves of Bergera koenigii . The structure determinations were considered based on the physical data and spectroscopic evidence, including 1D and 2D NMR experiments.