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 ethyl (6S)-6-methyl-2-[(3-nitrophenyl)methylideneamino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate .
user
C19H20N2O4S
assistant