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 (2R)-N-(2-fluorophenyl)-2-[[5-(2-fluorophenyl)-4-(2-methylpropyl)-1,2,4-triazol-3-yl]sulfanyl]propanamide .
user
C21H22F2N4OS
assistant