You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N,N-dimethyl-7-[2-(trifluoromethyl)phenyl]-2-trimethylstannylpyrrolo[2,3-b]pyrazine-5-sulfonamide ?
user
C18H21F3N4O2SSn
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