22285-49-0 23076-59-7 Bis(2-(trimethylammonio)ethyl) p-phenylenediacetate diiodide Choline iodide, p-benzenediacetate Choline, iodide, p-benzenediacetate (2:1) Ethanaminium, 2,2'-(1,4-phenylenebis((1-oxo-2,1-ethanediyl)oxy))bis(N,N,N-trimethyl-, diiodide PK-139 p-Benzenediacetic acid, diester with 2-(hydroxyethyl)trimethylammonium iodide