You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-methyl-3-(methylamino)-N-[6-[4-(trifluoromethyl)phenoxy]pyridin-3-yl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C17H18F3N3O2
assistant