You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-N'-[[(2R)-3-(4-fluorophenyl)sulfonyl-1,3-oxazinan-2-yl]methyl]oxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H20FN3O5S
assistant