You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(1,2-dihydroacenaphthylen-5-yl)-4-methyl-2-pyrimidin-2-yl-1,3-thiazole-5-carboxamide into its molecular formula.
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C21H16N4OS
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