You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[3-[[4-(3-chloro-4-fluoroanilino)-7-(oxolan-3-yloxy)quinazolin-6-yl]amino]piperidin-1-yl]prop-2-en-1-one into its molecular formula.
user
C26H27ClFN5O3
assistant