You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[3-fluoro-4-(1-oxo-1,5-thiazocan-5-yl)phenyl]-5-(triazol-1-ylmethyl)-1,3-oxazolidin-2-one by IUPAC nomenclature, provide its molecular formula.
user
C18H22FN5O3S
assistant