You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1,28-diaza-18lambda5-phosphaheptacyclo[16.12.0.02,11.04,9.012,17.019,24.025,30]triaconta-2,4,6,8,10,12,14,16,19,21,23,25(30),26,28-tetradecaene 18-oxide by IUPAC nomenclature, provide its molecular formula.
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C27H17N2OP
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