You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-[(5-bromothiophen-2-yl)-[4-(trifluoromethyl)phenyl]methyl]piperidine-2-carboxylic acid is given. What is its corresponding molecular formula?
user
C18H17BrF3NO2S
assistant