You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-6-chloro-N-[2-(3-methoxypropylcarbamoyl)phenyl]-4-methylsulfonyl-2,3-dihydro-1,4-benzoxazine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H24ClN3O6S
assistant