(二乙基氨基)(氧代)乙酸

diethyl (Z)-2-hydroxy-3-methylbut-2-enedioate

triethyl heptane-1,1,7-tricarboxylate

4-(4-甲氧基苯基)-2,4-二氧丁酸

2-(5-methoxy-4-methyl-2-nitrophenyl)acetic acid