ethyl 2-(1,4-dioxaspiro[4.4]nonan-8-yl)acetate

N-(5-acetyl-6-methyl-2-oxopyran-3-yl)benzamide

1-环丙基-6,7,8-三氟-1,4-二氢-4-氧代-3-喹啉羧酸乙酯

4-(4-氧代喹唑啉)苯甲酸

2-苯乙烯基-4-乙氧基亚甲基-5-恶唑酮