抄録
A water-soluble glycoside, (mp 209-220°(decomp.)), [α]_D-116°, C_<47>H_<70>O_<24>, named trillenoside (I), was isolated from the rhizomes of Trillium kamtschaticum Pall. (Liliaceae). The structure of its aglycone (trillenogenin) (II), mp 250-251°, [α]_D-198°, C_<26>H_<36>O_8, was determined by X-ray analysis of the tetraacetyl monobrosyl derivative, mp 242-244°(decomp.), [α]_D-112°, C_<40>H_<47>SO_<14>Br, and I was characterized as 15-oxo-18-nor-25-D-spirost-5, 13-diene-1β, 3β, 21, 23α, 24β-pentaol 1-O-β-D-apio-D-furanosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-α-L-arabinopyranoside. I is a novel type steroid glycoside, 18-norspirostanol oligoglycoside, and other points to be noted in the structure are: 1) enone system in the D-ring; 2) hydroxyl group at C_<21>; 3) two hydroxyl groups in the F-ring; 4) apiose in the branched-chain tetrasaccharide moiety.
