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system
Name the molecular formula for the molecule established as methyl (2Z)-2-[[4-(dimethylamino)phenyl]methylidene]-7-methyl-3-oxo-5-thiophen-2-yl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate using the IUPAC nomenclature.
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C22H21N3O3S2
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