bifuron corizium coryzium diafuron enterotoxon furall furanzolidone furaxon furaxone furazol furazolidine furazolidon furazolidona furazolidonum furazolum furazon furidon furmethoxadone furovag furox furoxal furoxane furoxon furoxone furozolidine giardil giarlam medaron neftin nicolen nifulidone nifuran nifurazolidone nifurazolidonum nitrofuradoxon nitrofurazolidone nitrofurazolidonum nitrofuroxon optazol ortazol puradin roptazol sclaventerol tikofuran topazone trichofuron tricofuron tricoron trifurox viofuragyn