You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[1-(5-ethylsulfanylpyridin-3-yl)sulfonyl-5-(2-fluorophenyl)pyrrol-3-yl]-N-methylmethanamine by IUPAC nomenclature, provide its molecular formula.
user
C19H20FN3O2S2
assistant