You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[3-[(4-methylpyridin-2-yl)amino]propoxy]-4a,11a-dihydrobenzo[b][1]benzoxepin-6-yl]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H26N2O4
assistant