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 [4-[(1R,2S,6S,7R)-1,7,8,9,10,10-hexachloro-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-3-methylphenyl] (3R)-5-oxo-1-phenylpyrrolidine-3-carboxylate is given. What is its corresponding molecular formula?
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C27H18Cl6N2O5
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