(2-Carboxy-1,1-dimethylethyl)trimethylammonium iodide ester with choline iodide 108903-57-7 AMMONIUM, (2-CARBOXY-1,1-DIMETHYLETHYL)TRIMETHYL-, IODIDE, ESTER with CHOLINE IO Ammonium, (2-carboxy-1,1-dimethylethyl)trimethyl-, iodide, ester with choline iodide