You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,4-dimethoxyphenyl)-4-[5-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]pyridin-2-yl]piperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H21F3N6O4
assistant