ChemInform Abstract: Conformations of Derivatives of 3,7‐Diazabicyclo(3.3.1)nonan‐9‐one. Comparison of 3‐Ethoxycarbonyl‐7‐methyl‐1,5‐diphenyl‐3,7‐diazabicyclo(3.3.1)nonan‐9‐one and 3,7‐Di(ethoxycarbonyl)‐1,5‐diphenyl‐3,7‐diazabicyclo(3.3.1)nonan‐9‐one: Effect of a Nucleophile···Electrophile Interaction on Molecular Geometry