You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (6R)-6-tert-butyl-2-[(3-iodo-4-methoxyphenyl)methylideneamino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile .
user
C21H23IN2OS
assistant