You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N,N-dimethyl-2-oxo-2-[6-[(4-phenylphenyl)sulfonylamino]-1H-indol-3-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C24H21N3O4S
assistant