Abstract:Objective To study the chemical constituents of bamboo root. Methods The chemicalconstituents were isolated by chromatographic methods and their structures were elucidated by analysis ofspectral data and physicochemical properties. Results Nine compounds were isolated and identified as 3-(p-hydroxyphenyl)-(2,3)oxirane-l-propionic acid(I),2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxy-phenyl)-1-propanone(Ⅱ),(+)-lirioresinol B(Ⅲ),protocatechuic aldehyde(IV),protocatechuic acid(V),orientin(VI),vitexin(VII}),homoorientin(VIII),and isovitexin(IX). Conclusion Compound I is anew compound named epoxy coumaric acid.