You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3R)-2,2-dimethyl-5-oxo-N-[3-oxo-3-(1,3-thiazol-2-ylamino)propyl]-3,9b-dihydro-[1,3]thiazolo[2,3-a]isoindole-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C19H20N4O3S2
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