You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1'-benzyl-7-chloro-2-(4,5-dimethyl-1,3-thiazol-2-yl)spiro[chromeno[2,3-c]pyrrole-1,3'-indole]-2',3,9-trione is given. What is its corresponding molecular formula?
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C30H20ClN3O4S
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