You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4-fluorophenyl)-[4-hydroxy-4-[2-[(4-methylpiperazin-1-yl)methyl]-1,3-thiazol-4-yl]piperidin-1-yl]methanone .
user
C21H27FN4O2S
assistant