You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-tert-butyl-2-[2-(4-tert-butyl-1H-pyrrolo[3,2-b]pyrrol-5-yl)-2-methylpropyl]-4-propan-2-yl-6H-thieno[2,3-b]pyrrole is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H39N3S
assistant