Synonyms: (2-Hydroxypropyl)trimethylammoniumiodide, acetate (6CI,7CI); 1-Propanaminium, 2-(acetyloxy)-N,N,N-trimethyl-,iodide (9CI); Ammonium, (2-hydroxypropyl)trimethyl-, iodide, acetate (8CI); (?à)-Acetyl-b-methylcholine iodide; Mecholyliodide; Methacholine iodide; NSC 281057