You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-(4,6-dimethylpyridin-2-yl)-1-[4-[4-(trifluoromethyl)pyrimidin-2-yl]piperazin-1-yl]ethanethione ?
user
C18H20F3N5S
assistant