tert-Butyl 4-((4-(4-bromo-2-fluorophenylamino)-6-methoxyquinazolin-7-yloxy)methyl)piperidine-1-carboxylate

for the following products 4-[[[4-[(4-Bromo-2-fluorophenyl)amino]-6-methoxy-7-quinazolinyl]oxy]methyl]-1-piperidinecarboxylic acid tert-butyl ester and tert-Butyl 4-((4-(4-bromo-2-fluorophenylamino)-6-methoxyquinazolin-7-yloxy)methyl)piperidine-1-carboxylate