2-(2-(Dimethylamino)ethoxy)-N-tricyclo(3.3.1.13,7)dec-1-ylacetamide monohydrochloride 41544-24-5 53783-83-8 EINECS 255-434-5 Tromantadin hydrochlorid Tromantadine hydrochloride Viru-Merz Virumerz Viruserol