95335-88-9 BUTANOIC ACID, 3-((TETRAHYDRO-1,3-DIMETHYL-2,6-DIOXO-5-NITROSO-4(1H)-PYRIMIDINYL Butanoic acid, 3-((tetrahydro-1,3-dimethyl-2,6-dioxo-5-nitroso-4(1H)-pyrimidinylidene)hydrazono)-, ethyl ester