1-hydroxy-6-phenyl-6-azabicyclo[3.2.1]oct-2-ene-4,7-dione

(Z)-5-hydroxy-2-(hydroxyimino)-8-phenyl-8-azabicyclo[3.2.1]oct-3-en-6-one

(Z)-1-hydroxy-4-(hydroxyimino)-6-phenyl-6-azabicyclo[3.2.1]oct-2-en-7-one

5-Hydroxy-8-p-tolyl-8-aza-bicyclo[3.2.1]oct-3-ene-2,6-dione 2-oxime