You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(aminomethyl)-2,3-dimethyl-N-[4-[4-(trifluoromethyl)piperidin-1-yl]phenyl]aniline by IUPAC nomenclature, provide its molecular formula.
user
C21H26F3N3
assistant