The less polar component of the glycoside mixture extracted from the bulbs of Muscaricomosum has been completely characterized. This glycoside, 5, possesses an α-L-rhamnopyranosyl(1→2)-β-D-glucopyranosyl(1→2)-α-L-arabinopyranosyl(1→6)-β-D-glucopyranosyl chain linked at the C-3 position of eucosterol 1.