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 (Z)-3-[5-[2-[5-[(E)-2-cyano-2-isocyanoethenyl]furan-2-yl]-4-methylthieno[3,2-b]pyrrol-5-yl]furan-2-yl]-2-isocyanoprop-2-enenitrile .
user
C23H11N5O2S
assistant