ethyl 3-[(2-ethoxy-2-oxoethyl)amino]-3-oxopropanoate

methyl 5-methylhexa-2,4-dienoate

ethyl 5-methyl-3E,5-hexadienoate

对氯肉桂酸乙酯

4-(4-硝基苯基)-3-氧代丁酸乙酯