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 (E)-N-methoxy-1-[1-(4-methylsulfonylphenyl)pyrrolo[2,3-b]pyridin-6-yl]-1-thiophen-2-ylmethanimine ?
user
C20H17N3O3S2
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