Steroidal saponins and alkaloids from the bulbs of lilium brownii var. colchesteri.

Abstract
The fresh bulbs of Lilium brownii var. colchesteri were found to contain five steroidal saponins: 26-O-.beta.-D-glucopyranosylnuatigenin 3-O-.alpha.-L-rhamnopyranosyl-(1 .fwdarw. 2)-.beta.-D-glucopyranoside (6), 26-O-.beta.-D-glucopyranosylnuatigenin 3-O-.alpha.-L-rhamnopyranosyl-(1 .fwdarw. 2)-O-[.beta.-D-glucopyranosyl-(1 .fwdarw. 4)]-.beta.-D-glucopyraoside (7), brownioside (8), deacylbrownioside (9) and 27-O-(3-hydroxy-3-methylglutaroyl)isonarthogenin 3-O-.alpha.-L-rhamnopyranosyl-(1 .fwdarw. 2)-O-[.beta.-D-glucopyranosyl-(1 .fwdarw. 4)]-.beta.-D-glucopyranoside (10); and two steroidal alkaloids: .beta.1-solamargine (11) and solasodine 3-O-.alpha.-L-rhamnopyranosyl-(1 .fwdarw. 2)-O-[.beta.-D-glucopyranosyl-(1 .fwdarw. 4)]-.beta.-D-glucopyranoside (12); along with several phenolic constituents. Compounds 7, 10 and 12 are new naturally-occurring compounds.

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