descocin dexawin dextrosulfenidol dextrosulphenidol efnicol hyrazin igralin macphenicol masatirin neomyson racefenicol racefenicolo racefenicolum raceophenidol racephenicol rincrol thiamcol thiamphenicolum thiocymetin thiomycetin thiophenicol tiamfenicol tiamfenicolo urfamicina urfamycine vicemycetin