You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule N-(3-cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)-5-(3,4-dichlorophenyl)furan-2-carboxamide ?
user
C20H14Cl2N2O2S
assistant