4-hydroxy-2,5-dioxo-1-phenyl-imidazolidine-4-carboxylic acid methylamide

4-phenyl-allophanic acid-(4-methoxy-phenyl ester)

4-phenyl-allophanic acid-(4-chloro-phenyl ester)

p-acetylphenyl 4-phenylallophanate

N-cyano-4-methyl-N-phenylbenzenesulfonamide