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 1-(3-chlorophenyl)-3-(4-pyrimidin-2-ylpiperazin-1-yl)-4-thiophen-2-ylpyrrole-2,5-dione ?
user
C22H18ClN5O2S
assistant