ethyl 3-(4-acetylphenyl)prop-2-enoate

ethyl 2-cyclopentyloxyacetate

2-diazonio-1-ethoxy-3-hydroxy-5-phenylpent-1-en-4-yn-1-olate

4-(3-溴-苯基)-3-氧代-丁酸乙酯

4-(2-吡啶)-1-哌嗪乙酸乙酯