You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 18,27-dioxa-3,6-diazaoctacyclo[15.14.0.02,14.03,7.08,13.019,31.020,28.021,26]hentriaconta-1(17),2(14),4,6,8,10,12,15,19(31),20(28),21,23,25,29-tetradecaene by IUPAC nomenclature, provide its molecular formula.
user
C27H14N2O2
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