4-Benzoyl-2-piperazinone

4-丙酰基-2-哌嗪酮

1-乙基-6-氟-4-氧代-7-(3-氧代-1-哌嗪基)-1,4-二氢-1,8-萘啶-3-羧酸

(4-nitrophenyl) 3-oxopiperazine-1-carboxylate

3-氧代哌嗪-1-羧酸乙酯