You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-acetyl-3-ethyl-5-methyl-N-[2-[(4-methylphenyl)sulfonylamino]ethyl]-1H-pyrrole-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25N3O4S
assistant