4-Imidazolidinone,3-ethyl-1-phenyl-2-thioxo, 3-ethyl-1-phenyl-2-thiohydantoin, 1-Aethyl-3-phenyl-2-thioxo-imidazolidin-4-on, 3-ethyl-1-phenyl-2-thioxo-1,3-diazolidin-4-one, 3-Ethyl-1-phenyl-2-thioxoimidazolidin-4-one, 3-Aethyl-1-phenyl-2-thioxo-imidazolidin-4-on, 1-Phenyl-3-aethyl-2-thio-hydantoin, 1-phenyl-3-ethyl-2-thiohydantoin, 5-Oxo-2-thioxo-1-ethyl-3-phenyl-imidazolidin