EC 2.4.2.8 (hypoxanthine phosphoribosyltransferase) inhibitor 6-hydroxypurine phosphoribosyltransferase inhibitor 6-mercaptopurine phosphoribosyltransferase inhibitor EC 2.4.2.8 (hypoxanthine phosphoribosyltransferase) inhibitor EC 2.4.2.8 (hypoxanthine phosphoribosyltransferase) inhibitors EC 2.4.2.8 inhibitor EC 2.4.2.8 inhibitors GMP pyrophosphorylase inhibitor GPRT inhibitor HGPRTase inhibitor HPRT inhibitor IMP pyrophosphorylase inhibitor IMP-GMP pyrophosphorylase inhibitor IMP:diphosphate phospho-D-ribosyltransferase inhibitor guanine phosphoribosyltransferase inhibitor guanine-hypoxanthine phosphoribosyltransferase inhibitor guanosine 5'-phosphate pyrophosphorylase inhibitor guanosine phosphoribosyltransferase inhibitor guanylate pyrophosphorylase inhibitor guanylic pyrophosphorylase inhibitor hypoxanthine phosphoribosyltransferase (EC 2.4.2.8) inhibitor hypoxanthine phosphoribosyltransferase (EC 2.4.2.8) inhibitors hypoxanthine phosphoribosyltransferase inhibitor hypoxanthine phosphoribosyltransferase inhibitors hypoxanthine-guanine phosphoribosyltransferase inhibitor inosinate pyrophosphorylase inhibitor inosine 5'-phosphate pyrophosphorylas inhibitore inosinic acid pyrophosphorylase inhibitor inosinic pyrophosphorylase inhibitor purine-6-thiol phosphoribosyltransferase inhibitor transphosphoribosidase inhibitor EC 2.4.2.* (pentosyltransferase) inhibitor