N,N,N',N'-tetramethylethane-1,2-diamine; Tetramethyl Ethylene Diamine; Potassium Clavulanate - Impurity J (Freebase) (EP/BP); 1,2-Bis(dimethylamino)ethane; (2-(Dimethylamino)ethyl)dimethylamine; N,N,N',N'-Tetramethylethylenediamine