The molecule is the iminium ion derived from acid green 5 (the disodium salt). It is a conjugate acid of an acid green 5(2-).
ethyl-[4-[[4-[ethyl-[(3-sulfophenyl)methyl]amino]phenyl]-(4-sulfophenyl)methylidene]cyclohexa-2,5-dien-1-ylidene]-[(3-sulfophenyl)methyl]azanium