You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(2-chlorophenyl)methylsulfanyl]ethyl]-3-methoxy-5,6,7,8-tetrahydronaphthalene-2-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H24ClNO3S2
assistant