You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2,4-dichlorophenyl)methyl]-4-(2,2,2-trifluoroethyl)piperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H16Cl2F3N3O
assistant