(2-Hydroxyethyl)trimethylammonium bicarbonate 78-73-9 Choline bicarbonate Choline, carbonate (1:1) (salt) Choline, hydrogen carbonate Ethanaminium, 2-hydroxy-N,N,N-trimethyl-, carbonate (1:1) (salt) Hydroxyethyltrimethylammonium bicarbonate NSC163321