You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(5-fluoropyridin-2-yl)oxymethyl]-5-methylthiomorpholin-4-yl]-[2-(triazol-2-yl)phenyl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H20FN5O2S
assistant