methyl (2S)-4-methylene-1-p-toluenesulfonylpyrroplidine-2-carboxylate

1-(tert-butoxycarbonyl)-2-(methoxycarbonyl)-4-methyl-1H-pyrrole-3-carboxylic acid

N-(2-methyl-3-oxoprop-1-enyl)glycine methyl ester

1-(benzenesulfonyl)pyrrole-3-carbaldehyde