You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9H-fluoren-9-ylmethyl N-[(2R)-3-tert-butylsulfanyl-1-fluoro-1-oxopropan-2-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H24FNO3S
assistant