21106-16-1 Choline iodide ester with picolinic acid Choline, iodide, picolinate Ethanaminium, 2-((2-pyridinylcarbonyl)oxy)-N,N,N-trimethyl-, iodide Picolinic acid ester with choline iodide Pyridine-2-carboxylic acid ester with choline iodide