You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-phenyl-N-[2-pyrrolidin-1-yl-5-(trifluoromethyl)phenyl]-1,2,4-triazole-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H18F3N5O
assistant