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-[[(2R,6S)-4-[(3-fluorophenyl)methyl]-2,6-dimethylpiperazin-1-yl]methyl]-N-hydroxybenzamide .
user
C21H26FN3O2
assistant