5-(4-Bromo-benzoyl)-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid methyl ester
methyl 5-(4-ethynylbenzoyl)-1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylate
5-(3-Acetoxy-benzoyl)-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid methyl ester
5-(3-Nitro-benzoyl)-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid methyl ester
5-(4-Prop-2-ynyloxy-benzoyl)-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid methyl ester