2-(Dimethylethylammonio)butyl 3-(dimethylethylammonio)propionate diiodide 2-Butanaminium, N,N-dimethyl-1-(3-(dimethylethylammonio)-1-oxopropoxy)-N-ethyl-, diiodide EJ4135000 N,N-Dimethyl-1-(3-(dimethylethylammonio)-1-oxopropoxy)-N-ethyl-2-butanaminium diiodide