You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-methoxy-2-methyl-N-[(1R)-1-[3-nitro-5-(trifluoromethyl)phenyl]ethyl]-6-piperidin-4-ylquinazolin-4-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26F3N5O3
assistant