You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-[[(2-methoxy-2-oxoethyl)-(4-methoxyphenyl)sulfonylamino]methyl]-5-nitroindole-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27N3O9S
assistant