methaphenilene methaphenilene methaphenilene is an antihistamine and anticholinergic. methaphenileneidentifiers iupac name n,n-dimethyl-n′-phenyl-n′-(thiophen-2-ylmethyl)ethane-1,2-diamine cas number493-78-7 ychemspider9884 yuniiq1mp2mrw1ecomptox dashboard (epa)dtxsid5020817 echa infocard100.007.074 chemical and physical dataformulac15h20n2smolar mass260.40 g·mol−13d model (jsmol)interactive image smiles cn(c)ccn(cc1cccs1)c2ccccc2 inchi inchi=inchi=1s/c15h20n2s/c1-16(2)10-11-17(13-15-9-6-12-18-15)14-7-4-3-5-8-14/h3-9,12h,10-11,13h2,1-2h3 ykey:ldyjxvuovpvzka-uhfffaoysa-n y not to be confused with methapyrilene. synthesis methaphenilene can be synthesized from n,n-dimethyl-n′-phenylethane-1,2-diamine by alkylation with 2-(chloromethyl)thiophene. methaphenilene synthesis