Diacetylcholine

2,2'-(succinylbis(oxy))bis(N,N,N-triMethylethanaMiniuM)

2,2'-[(1,4-Dioxo-1,4-butanediyl)bis(oxy)]bis[N,N,N-trimethylethanaminium]

2,2'-[(1,4-Dioxobutane-1,4-diyl)bis(oxy)]bis[N,N,N-trimethyl-1-ethanaminium]