Methyl 3,4-dibromo-2,5-dioxo-2,5-dihydro-1H-pyrrole-1-carboxylate
2,5-Dioxopyrrolidin-1-yl 4-(4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)phenyl)butanoate
tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-pyrrole-1-carboxylate
tert-Butyl 4-bromo-2-oxo-2,5-dihydro-1H-pyrrole-1-carboxylate