1-(2-Carboxyethyl)-1-methylpyrrolidinium iodide ester with choline iodide 37637-75-5 Pyrrolidinium, 1-(2-carboxyethyl)-1-methyl-, iodide, ester with choline iodide Pyrrolidinium, 1-methyl-1-(3-oxo-3-(2-(trimethylammonio)ethoxy)propyl)-, diiodide