tert-Butyl-(3-ethyl-4-methyl-pyrrolyl-2)-methanoat

tert-butyl 3-ethyl-5-iodo-4-methylpyrrole-2-carboxylate

5-chlorocarbonyl-4-ethyl-3-methyl-pyrrole-2-carboxylic acid benzyl ester

2-benzyl 5-(tert-butyl) 4-ethyl-3-methyl-1H-pyrrole-2,5-dicarboxylate