You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[4-[(5-thiophen-2-yl-1H-1,2,4-triazol-3-yl)sulfanyl]butyl]isoindole-1,3-dione ?
user
C18H16N4O2S2
assistant