The molecule is an iminium ion that is the free acid form of Guinee green B. It is a conjugate acid of a Guinee green B(1-).
ethyl-[4-[[4-[ethyl-[(3-sulfophenyl)methyl]amino]phenyl]-phenylmethylidene]cyclohexa-2,5-dien-1-ylidene]-[(3-sulfophenyl)methyl]azanium