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 tert-butyl 2-[4-(4-ethylsulfonylpiperazin-1-yl)phenyl]-3a,6a-dimethyl-1,3,4,6-tetrahydropyrrolo[3,4-c]pyrrole-5-carboxylate .
user
C25H40N4O4S
assistant