ethyl 3-pyridin-3-ylprop-2-ynoate

ethyl 3,4,5,6-tetramethylpyridine-2-carboxylate

ethyl N-anilinocarbamate

2-萘-1-基-丙二酸二乙酯

ethyl 4-oxo-5,6,7,8-tetrahydro-3H-[1]benzothiolo[2,3-d]pyrimidine-2-carboxylate