You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[4-(difluoromethoxy)phenyl]-N-[5-(2-piperidin-1-ylethyl)pyridin-3-yl]pyrimidin-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25F2N5O
assistant