You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(7-bromo-3-oxo-1,4-benzoxazin-4-yl)-N-(3-cyclopentyloxy-4-methoxyphenyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23BrN2O5
assistant