丁二酰亚胺

4-(4-溴苯基)-4-氧丁酸乙酯

4-(4-氯-苯基)-4-氧代-丁酸乙酯

4-(1-萘基)-4-氧代丁酸乙酯

ethyl 4-(3-methylphenyl)-4-oxobutanoate