You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(E)-[(1Z)-1-[(2-fluorophenyl)methylidene]-3-methylbenzo[e]indol-2-ylidene]methyl]-3-methylbenzo[g][1,3]benzoxazol-3-ium by IUPAC nomenclature, provide its molecular formula.
user
C33H24FN2O+
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