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 (1R)-4,12,13-trimethoxy-17-methyl-17-azatetracyclo[7.6.2.02,7.010,15]heptadeca-2(7),3,5,10,12,14-hexaen-3-ol is given. What is its corresponding molecular formula?
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C20H23NO4
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