1-Ethyl-1-(3-hydroxypropyl)pyrrolidinium iodide, 2,4-diphenyl-1,3-cyclobutanedicarboxylate 4252-08-8 Pyrocyclonium Pyrrolidinium, 1-ethyl-1-(3-hydroxypropyl)-, iodide, ester with (cis-1,2,trans-1,3,trans-1,4)-2,4-diphenyl-1,3-cyclobutanedicarboxylic acid (2:1)