aczone atrisone avlosulfon avlosulfone avlosulphone benzenamide benzenamine bissulfone bissulphone croysulfone croysulphone dapson dapsona dapsonum daspone diaphenylsulfon diaphenylsulfone diaphenylsulphon diaphenylsulphone diphenasone diphone disulfone disulone disulphone dubronax dumitone eporal medapsol novophone servidapson sulfadione sulfona sulfonyldianiline sulphadione sulphonyldianiline tarimyl udolac undolac