You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (20S,28S)-20,28-dihydroxy-19-oxa-3,10-diazaheptacyclo[16.10.0.02,11.04,9.012,17.020,28.021,26]octacosa-1(18),2,4,6,8,10,12,14,16,21,23,25-dodecaen-27-one is given. What is its corresponding molecular formula?
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C25H14N2O4
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