95335-85-6 BUTANOIC ACID, 3-((TETRAHYDRO-1,3-DIMETHYL-2,6-DIOXO-4(1H)-PYRIMIDINYLIDENE)HYDR Butanoic acid, 3-((tetrahydro-1,3-dimethyl-2,6-dioxo-4(1H)-pyrimidinylidene)hydrazono)-, ethyl ester, monohydrochloride