β-Methylcholine EINECS 219-183-5 beta-methylcholine (2-Hydroxypropyl)trimethylaminium 2-Hydroxy-N,N,N-trimethyl-1-propanaminium 2-Hydroxy-N,N,N-trimethylpropan-1-aminium 2-Hydroxypropyltrimethylaminium Trimethyl(2-hydroxypropyl)aminium