You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-(3-chloro-4-hydroxy-5-methoxyphenyl)-9-methyl-1,3,7,10-tetraoxo-3a,4,6,11,11a,11b-hexahydronaphtho[2,3-e]isoindole-2-carboxamide into its molecular formula.
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C25H21ClN2O7
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