ethyl 2-oxo-1,3-dihydroindole-5-carboxylate

N-乙苯甲醯胺

ethyl 4-bromo-2,2-dimethylbutanoate

ethyl 2-[4-oxo-5-(pyridin-3-ylmethylidene)-2-sulfanylidene-1,3-thiazolidin-3-yl]acetate

4-hydroxy-tetrahydro-pyran-2,6-dicarboxylic acid diethyl ester