title: Preparation of porphyrin methyl esters for high pressure liquid chromatography.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005243:Feces / Q000032:analysis; D006801:Humans; D011166:Porphyrins / Q000032:analysis / Q000138:chemical synthesis*
chemical_list: D011166:Porphyrins