Biphemanil; Demotil; Diphemanil; Diphemanil Methyl Sulfate; Diphemanil Metilsulfate; Diphenatil; Diphenmanil Methylsulfate; Diphenmethanil; Diphenmethanil Methylsulfate; N,N-Dimethyl-4-piperidylidene-1,1-diphenylmethane Methylsulfate; NSC 41725; Nivelon; Nivelona; Prantal; Prantil; Prentol; Talpran; Vagophemanil; Vagophemanil Methyl Sulfate; Variton; 4-(Diphenylmethylene)-1,1-dimethylpiperidinium Methyl Sulfate