methyl 4,4-difluoro-2,4-diiodobutanoate

methyl 2-(trifluoromethylsulfonyloxy)acetate

methyl 3-carbazol-9-ylpropanoate

dimethyl 9-methylcarbazole-2,3-dicarboxylate

dimethyl 1-hydroxy-9-methyl-9H-carbazole-2,3-dicarboxylate