title: 3,4-Dihydroxycinnamic acid, an antithiamine factor of fern.
mesh_terms: D002845:Chromatography; D002855:Chromatography, Thin Layer; D002934:Cinnamates / Q000032:analysis*; D010944:Plants / Q000032:analysis*; D013831:Thiamine / Q000037:antagonists & inhibitors*
chemical_list: D002934:Cinnamates; D013831:Thiamine