STUDIES OF THE FLAVONOIDS OF THE GENUS TRILLIUM PART 3 - FLAVONOL GLYCOSIDES IN THE LEAVES OF TRILLIUM APETALON MAKINO AND T-KAMTSCHATICUM PALLAS

摘要

Seven flavonol glycosides were isolated from the leaves of T. apetalon. They were identified chromatographically and spectrally to be: quercetin/kaempferol 3-0-alpha-arabinopyranosyl-(1 --> 6)-beta-galactopyranoside (TQ and TK), quercetin/kaempferol 3-O-[2'''-O-acetyl-alpha-arabinopyranosyl] -(1 --> 6)-beta-galactopyranoside (TAQ and TAK), quercetin 3-O-beta-glucoside (ISQ), isorhamnetin 3-O-alpha-arabinopyranosyl-(1 --> 6)-beta-galactopyranoside (TI) and isorhamnetin 3-O-[2'''-O-acetyl-alpha-arabinopyranosyl]-(1 --> 6)-beta-galactopyranoside (TAI). TQ, TAQ, TI and TAI were major constituents. This is the first report on two new isorhamnetin-type glycosides, TI and TAI. The seven flavonol glycosides identical to those of T. apetalon were isolated and identified in the leaves of T. kamtschaticum; TQ and TAQ were also major components, but TI and TAI were only minor components. TI and TAI were not detected in the leaves of T. tschonoskii. These leaf-flavonoid patterns were discussed from a chemosystematic point of view. [References: 15]