You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-1-[3-[(1S)-1-aminoethyl]phenyl]propan-2-yl]-6-(4-methylpyridin-3-yl)quinazolin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27N5
assistant