endo-4-phenyl-4-aza-10-oxatricyclo[5.2.1.0]dec-8-ene-3,5-dione

exo-10-acetyl-4-phenyl-4,10-diazatricyclo(5.2.1.02,6)dec-8-ene-3,5-dione

endo-10-benzoyl-4-phenyl-4,10-diazatricyclo<5.2.1.02,6>dec-8-ene-3,5-dione

exo-10-benzoyl-4-phenyl-4,10-diazatricyclo(5.2.1.02,6)dec-8-ene-3,5-dione

N-Phenyl-exo-6-methyl-8-ethyl-8-azabicyclo[2.2.2]oct-4-en-7-one-1,2-dicarboximide