Two new glycosidic acids, calyhedic acids E and F, in crude resin glycoside fraction from .

Two new glycosidic acids, calyhedic acids E () and F (), were isolated from the glycosidic acid fraction afforded by alkaline hydrolysis of the crude resin glycoside fraction obtained from whole plants of Wall. Compounds and were characterised as 11-hydroxyhexadecanoic acid 11--β-D-glucopyranosyl-(1→6)--β-D-glucopyranosyl-(1→6)--β-D-glucopyranosyl-(1→3)-[-α-L-rhamnopyranosyl-(1→2)]--β-D-glucopyranosyl-(1→2)-β-D-quinovopyranoside and an isomer of , in which the 11-hydroxyhexadecanoyl residue of was replaced by a 12-hydroxyhexadecanoyl residue, respectively, on the basis of spectroscopic data.