2-(Dimethylamino)ethyl (2-ethylbutoxy)diphenylacetate 2-(Dimethylamino)ethyl-O-(2-ethylbutyl)benzilate 3321-06-0 3579-62-2 Denaverina [INN-Spanish] Denaverine Denaverine [INN] Denaverinum [INN-Latin] Spasmalgan