ethyl 2-(4-bromo-2-nitrophenyl)-2-methylpropanoate

tert-butyl (S)-2-((2-(4-bromo-2-nitrophenyl)propan-2-yl)carbamoyl)pyrrolidine-1-carboxylate

tert-butyl (S)-2-((2-(2-amino-4-bromophenyl)propan-2-yl)carbamoyl)pyrrolidine-1-carboxylate

tert-butyl (S)-2-(7-bromo-4,4-dimethyl-3,4-dihydroquinazolin-2-yl)pyrrolidine-1-carboxylate