You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[4-(3,4-dichloro-2-fluoroanilino)-7-[(3S)-oxolan-3-yl]oxyquinazolin-6-yl]oxypiperidin-1-yl]prop-2-en-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H25Cl2FN4O4
assistant