1-Butyl-2-methyl-1H-imidazole13435-22-836 % similar 1-Butyl-3-methylimidazolium tetrafluoroborate174501-65-633 % similar 1-Ethyl-3-methylimidazolium hexafluorophosphate155371-19-033 % similar Tetrabutylammonium hexafluorophosphate3109-63-533 % similar 1-Butyl-3-methylimidazolium iodide65039-05-632 % similar 1-Butyl-3-methylimidazolium chloride79917-90-132 % similar 1-Butyl-3-methylimidazolium bromide85100-77-232 % similar 1-Butyl-1-methylpyrrolidinium hexafluorophosphate330671-29-930 % similar