You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(1E)-3-methyl-4,4-bis(methylsulfanyl)buta-1,3-dienyl]cyclopropyl]-(4-methylphenyl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H22OS2
assistant