2,2'-dimethyl-3',4'-dihydro-2H,2'H-[2,3']bifuranyl-5,5'-dione

硝基乙腈

1-(3,4-dimethoxy-5-nitrophenyl)ethanone

4-iodobenzene-1,3-diol

2-methanesulfonyl-acetoacetic acid ethyl ester