5-phenyl-3H-1,3-oxazol-2-one

4-苯基-1,3-二氢-2H-咪唑-2-酮

2,6-diphenyl-4,5-dihydro-1,2,4-triazin-3-one

3-(2-氧代-2-苯基乙基)-1,3-噻唑烷-2,4-二酮

3-amino-4-phenyl-1H-imidazol-2-one