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system
Name the molecular formula for the molecule established as 6-O-ethyl 3-O-methyl 2-[(4-methoxy-1,3-benzothiazol-2-yl)amino]-5,7-dihydro-4H-thieno[2,3-c]pyridine-3,6-dicarboxylate using the IUPAC nomenclature.
user
C20H21N3O5S2
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