You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(propylamino)-N-[3-(3,4,5,6-tetrahydro-2H-azepin-7-ylsulfamoyl)phenyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H26N4O3S
assistant