You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 3-pyrrolidin-1-yl-1-(4-pyrrolidin-1-ylphenyl)-4-thiophen-2-ylpyrrole-2,5-dione ?
user
C22H23N3O2S
assistant