The molecule is an iminium ion that forms the cationic portion of the histological dye 'ethyl green'. It is an iminium ion and a quaternary ammonium ion.
[4-[[4-(dimethylamino)phenyl]-(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]phenyl]-ethyl-dimethylazanium