You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(4-aminobutylsulfamoyl)-4-methylphenyl]-2-(4,5-dichloro-6-oxopyridazin-1-yl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21Cl2N5O4S
assistant