You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl-[5-[2-(1-ethyl-3,3-dimethylindol-2-ylidene)ethylidene]-9-[(E)-(1-ethyl-3,3-dimethylindol-2-ylidene)methyl]-2-methyl-7,8-dihydro-6H-xanthen-3-ylidene]azanium into its molecular formula.
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C43H50N3O+
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