You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(E,3Z)-3-(3,3-dimethyl-5-nitro-1-propylindol-2-ylidene)prop-1-enyl]-1,1-dimethyl-3-propylbenzo[e]indol-3-ium by IUPAC nomenclature, provide its molecular formula.
user
C33H38N3O2+
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