You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl]sulfonylthiophene-2-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H14F3N3O4S2
assistant