You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6,17-bis(benzotriazol-2-yl)-4,19-ditert-butyl-7,16-diethoxy-5,18-dihydroxytricyclo[13.4.0.03,8]nonadeca-1(15),3(8),4,6,16,18-hexaen-2-one by IUPAC nomenclature, provide its molecular formula.
user
C43H50N6O5
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