You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[6-(4-nitrophenyl)pyridazin-3-yl]sulfanyl-N-[[(2S)-oxolan-2-yl]methyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H18N4O4S
assistant