anastaf archisulfa archisulpha avissul chemiopen demosulfan demosulphan durisan isosulfamerazine isosulphamerazine methylsulfadiazin methylsulfadiazine methylsulphadiazine novosul orosulfan pallidin retardon risulfasens sulfaperina sulfaperine sulfaperinum sulfatreis sulfopirimidine sulpenta sulphaperin sulphaperina sulphaperinum