You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (3E,5E)-5-bromo-3-ethylsulfonyl-2-methylidene-N-[1-methyl-5-(trifluoromethylsulfanyl)pyridin-2-ylidene]hepta-3,5-dienamide ?
user
C17H18BrF3N2O3S2
assistant