You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(dimethylamino)propyl]-N-(4-fluoro-1,3-benzothiazol-2-yl)-3-phenoxypropanamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H25ClFN3O2S
assistant