You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
15-(2,6-diphenylpyrimidin-4-yl)-18,18-dimethyl-12-oxa-15-azaheptacyclo[14.11.0.02,14.05,13.06,11.017,25.019,24]heptacosa-1(16),2(14),3,5(13),6,8,10,17(25),19,21,23,26-dodecaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C43H29N3O
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