You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,10R,11R,12R)-14-butyl-12-methyl-11-phenyl-8-oxa-14,17-diazatetracyclo[8.7.0.02,7.012,17]heptadeca-2,4,6-triene-13,16-dione into molecular formula.
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C25H28N2O3
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