You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-[(5-bromo-1H-imidazol-2-yl)-(4-fluorophenyl)methyl]piperidine;hydrochloride by IUPAC nomenclature, provide its molecular formula.
user
C15H18BrClFN3
assistant