You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 7-methoxy-2-[(4-methylphenyl)sulfonyloxymethyl]-2,3-dihydro-1,4-benzoxazine-4-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27NO7S
assistant