title: Rapid isolation and quantitation of biopterin, neopterin, and their guanine ribotide precursor from biological samples.
mesh_terms: D001708:Biopterins / Q000031:analogs & derivatives / Q000032:analysis / Q000302:isolation & purification*; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D006150:Guanine Nucleotides / Q000302:isolation & purification; D008832:Microchemistry; D011621:Pteridines / Q000302:isolation & purification*
chemical_list: D006150:Guanine Nucleotides; D011621:Pteridines; D001708:Biopterins