[Chemical Constituents from Roots and Rhizome of Trillium tschonoskii( Ⅳ)].

To investigate the chemical constituents from the roots and rhizome of Trillium tschonoskii.

The85% methanol elution parts from the roots and rhizome of Trillium tschonoskii were separated and purified by polyamide,silica gel,RPC18,Sephadex LH-20 column chromatography and the preparation of high performance liquid. Chemical structures were identified by MS,1D and 2D-NMR experiment.

Ten steroidal saponins compounds were isolated and identified as diosgenin-3-O-α-L-rhamnopyranosyl-( 1→4)-α-L-rhamnopyranosyl-( 1→4)-[α-L-rhamnopyranosyl( 1 →2) ]-β-D-glucopyranoside( 1),trikamsteroside E( 2),deoxytrikamsteroside E( 3),( 23 S,24S,25S)-spirostan-5-ene-1β,3β,21,23,24-pentahydroxy-1β-O-α-L-rhamnopyranosyl-( 1 →2)-[O-β-D-xylopyranosyl( 1→3) ]-O-α-L-pyranarabinoside( 4),trikamsteroside B( 5),27-hydroxy-trikamsteroside B( 6),3-acetyl-pennogenin( 7),dioscoreanoside I( 8),sileneoside G( 9) and intergristerone B( 10).

Compounds 8 ~ 10 are isolated from this genus for the first time,compounds 1,3,4,6,7 are isolated from this plant for the first time.