You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[(3S,4R,5R)-5-[[[3-(2-chlorophenyl)oxiran-2-yl]amino]methyl]-3,4-dihydroxyoxolan-3-yl]methyl]-3-fluorobenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H22ClFN2O5
assistant