You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[2-(4-pyrrolidin-1-ylsulfonylpiperazin-1-yl)ethyl]-6,7-dihydro-5H-cyclopenta[c]pyridazin-3-one .
user
C17H27N5O3S
assistant