(4-甲氧基苯氧基)乙酸乙酯

Methyl-ethoxycarbonylmethyl-<2-ethoxycarbonyl-ethyl>-amin

氯甲烷

5-溴-7-甲氧基-1-苯并呋喃-2-羧酸

2-(4-硝基苯氧基)乙酸甲酯