1 ACH Acetylcholine 1.000 2 J0R [(2r)-1-(trimethyl-$L^4-azanyl)propan-2-yl] ethanoate 0.909 3 CCE 2-[(aminocarbonyl)oxy]-N,N,N-trimethylethanaminium 0.818 4 SCU N,N,N-trimethyl-2-[(4-oxobutanoyl)oxy]ethanaminium 0.769