tert-butyl (S)-8-((5-bromo-2-carbamoylphenyl)carbamoyl)-1,4-dioxa-7-azaspiro[4.4]nonane-7-carboxylate

tert-butyl (S)-8-(7-bromo-4-oxo-3,4-dihydroquinazolin-2-yl)-1,4-dioxa-7-azaspiro[4.4]nonane-7-carboxylate

(S)-7-bromo-2-(1,4-dioxa-7-azaspiro[4.4]nonan-8-yl)quinazolin-4(3H)-one