On antithiamine factors of fern.
D001681:Biological Assay; D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D008011:Lichens; D010636:Phenols; D010936:Plant Extracts; D013831:Thiamine / Q000037:antagonists & inhibitors*
D010636:Phenols; D010936:Plant Extracts; D013831:Thiamine