You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[[4-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl]methyl]-3-(2-methoxyphenyl)-1,2-oxazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H20ClF3N4O2
assistant