You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 8-tert-butyl-6-[2-(2-cyclopropyl-7-imino-5H-pyrrolo[3,4-b]pyridin-6-yl)acetyl]-4-methyl-2,3-dihydro-1,4-benzoxazine-2-carboxylate;hydrobromide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H35BrN4O4
assistant