You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(6-tert-butyl-3-cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)-2-[3-[(2-phenylacetyl)amino]phenyl]sulfanylbutanamide into molecular formula.
user
C31H35N3O2S2
assistant