Abstract:To understand the chemical constituents from Dasymaschalon rostratum, eight compounds were obtained from its roots by multiple chromatographic separation techniques. On the basis of spectral data, their structures were identified as (+)-taxifolin (1), catechin (2), calycosin (3), (-)-syringaresinol (4), (-)-medioresinol (5), lirioresinol A (6), N-trans-cinnamoyltyramine (7), and hydroxytyrosol (8). All of the compounds were isolated from this plant for the first time. Compounds 1-8 showed no obvious antibacterial activites.