You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-chloro-6-methyl-N-[2-[1-[4-(trifluoromethoxy)phenyl]pyrazol-4-yl]ethyl]pyrimidin-4-amine;trioxidanylsulfanylmethane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H19ClF3N5O4S
assistant