diethyl 2-decyl-3-oxobutanedioate

正癸基丙二酸二乙酯

1-哌啶基乙醛酸乙酯

ethyl 8-hydroxy-4-oxochromene-2-carboxylate

5-羟基-4-氧代-4H-色烯-2-羧酸