You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[7-methylidene-5,9-bis-(4-methylphenyl)sulfonyl-1,5,9-triazacyclododec-1-yl]-phenylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H37N3O5S2
assistant