diethyl 3-(4-methoxyphenyl)isoxazole-4,5-dicarboxylate

diethyl (Z)-2-(2,2,5-trimethyl-4-oxopiperidin-1-yl)but-2-enedioate

ethyl 2-oxobenzo[h]chromene-4-carboxylate

1,1,4,4-四苯基-2-丁炔-1,4-二醇

diethyl 2,2-diethoxybutanedioate