1-(4-chloro-butyl)-3,3-diphenyl-pyrrolidin-2-one
1-ethyl-1-(3-carbamoyl-3,3-diphenyl-propyl)-pyrrolidinium; ethyl sulfate
1-(3-carbamoyl-3,3-diphenyl-propyl)-1-methyl-pyrrolidinium; iodide
2,2-diphenyl-4-pyrrolidino-butyric acid
2,2-diphenyl-4-pyrrolidino-butyric acid amide