You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-N-[(2S)-butan-2-yl]-4-N-(2-phenylethyl)-6-[3-(trifluoromethoxy)phenyl]pyrimidine-2,4-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25F3N4O
assistant