ethyl 3-methyl-5-oxo-2,5-dihydroisoxazole-4-carboxylate sodium salt

ethyl 3-(4-ethoxycarbonyl-5-hydroxyisoxazol-3-yl)-propionate

3-氧己二酸二甲酯

2-oxo-butane-1,1,4-tricarboxylic acid-1,1-diethyl ester

丙二酸二乙酯钠盐