ethyl 2-(2-ethoxy-2-oxoethyl)sulfonylacetate

ethyl 7-chloroheptanoate

2-ethenyl-1H-pyrrole

2-(1-ethoxyethyl)-N-methyl-1H-pyrrole

N-[4-[4-(乙氧羰基氨基)苯基]磺酰基苯基]氨基甲酸乙酯