You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(7-methyl-[1,3]thiazolo[4,5-g][1,3]benzothiazol-2-yl)-2-naphthalen-2-yloxyacetamide into its molecular formula.
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C21H15N3O2S2
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