You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3E)-4-tert-butyl-1,7,7-trimethyl-3-[(E)-3-phenylprop-2-enylidene]bicyclo[2.2.1]heptan-2-one by IUPAC nomenclature, provide its molecular formula.
user
C23H30O
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