You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3R)-6-[1-(azetidin-1-yl)-2-hydroxypropan-2-yl]-3-(4-chlorophenyl)-2-[(5-chloropyridin-2-yl)methyl]-3-methoxyisoindol-1-one by IUPAC nomenclature, provide its molecular formula.
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C27H27Cl2N3O3
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