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... > LIFE SCIENCES > biology > biochemistry > biochemistry by substance > biochemical substances by activity or property > biological response modifiers > metabolic inhibitors > thiouracil > quaternary ammonium compounds

... > PHYSICAL SCIENCES > chemistry > chemical substances > chemical substances by use or effect > inhibitors > metabolic inhibitors > thiouracil > quaternary ammonium compounds

... > PHYSICAL SCIENCES > chemistry > chemical substances > chemical elements and compounds > inorganic compounds > organic compounds > organic compounds by structure or composition > organic compounds by non-carbon element > organic compounds by non-metallic element > organic nitrogen compounds > heterocyclic nitrogen compounds > pyrimidines > uracil derivatives > thiouracil > quaternary ammonium compounds

... > PHYSICAL SCIENCES > chemistry > chemical substances > chemical elements and compounds > organic/inorganic compounds > ammonium compounds > quaternary ammonium compounds