title: Isolation of a red pigment from the uric acid calculi.
mesh_terms: D002852:Chromatography, Ion Exchange; D003461:Crystallography; D006863:Hydrogen-Ion Concentration; D007669:Kidney Calculi / Q000378:metabolism*; D010860:Pigments, Biological / Q000302:isolation & purification; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014527:Uric Acid / Q000378:metabolism*
chemical_list: D010860:Pigments, Biological; D014527:Uric Acid