2-hydroxy-3-nitrothiochromen-4-one

2-benzoyl-2-ethoxycarbonylbenzo[b]thiophen-3(2H)-one

乙醇

ethyl 3-(2-benzylsulphinyl)phenyl-2-diazo-3-oxopropanoate

ethyl 1-benzyl-2,3-dihydro-3-oxobenzo[b]thiophene-1-oxide-2-carboxylate,inner salt