1-(2,5-Dioxo-pyrrolidin-1-ylmethyl)-1-(4-hydroxy-4,4-diphenyl-but-2-ynyl)-pyrrolidinium; chloride

mono(1,1'-((2,5-dioxo-4,4-diphenylimidazolidine-1,3-diyl)bis(methylene))bis(1-(4-hydroxy-4,4-diphenylbut-2-yn-1-yl)pyrrolidin-1-ium)) monobromide

N-(4,4-Diphenyl-4-hydroxy-2-butynyl)-N-phthalimidomethyl pyrrolidinium chloride

1-(4-hydroxy-4,4-diphenylbut-2-yn-1-yl)-1-((pivaloyloxy)methyl)pyrrolidin-1-ium chloride

1-(acetoxymethyl)-1-(4-hydroxy-4,4-diphenylbut-2-yn-1-yl)pyrrolidin-1-ium chloride