ethyl 5-methyl-3,4-dioxothieno[3,2-c]quinoline-2-carboxylate

ethyl 2-carbonochloridoylsulfanylacetate

ethyl 2-propan-2-ylsulfanylacetate

ethyl 2-pentylsulfanylacetate

3-氨基-5-(4-溴-苯基)-噻吩-2-羧酸乙酯