You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-bromo-3-(3-butoxypropyl)-20-methoxy-3,13-diazahexacyclo[14.8.0.02,10.04,9.011,15.017,22]tetracosa-1(16),2(10),4(9),5,7,11(15),17(22),18,20-nonaen-14-one by IUPAC nomenclature, provide its molecular formula.
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C30H31BrN2O3
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