You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[(1-methylbenzo[e][1,3]benzothiazol-1-ium-2-yl)methylidene]-2-[(1-methylbenzo[e][1,3]benzothiazol-2-ylidene)methyl]-3-oxocyclobuten-1-olate into its molecular formula.
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C30H20N2O2S2
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