ChemInform Abstract: Selective Synthesis of 6′‐Arylidene‐1‐aryl‐3‐aryl‐spiro[pyrrolizidine‐2, 2′‐cyclohexanone] by Cycloaddition of Azomethine Ylides to Dibenzylidene Cyclohexanone. Issue 36 (September 2015)