N-\u200b4-\u200b3,\u200b4-\u200bbis(sulfomethyl)\u200bphenyl\u200b4-\u200b(diethylamino)\u200bphenyl\u200bmethylene\u200b-\u200b2,\u200b5-\u200bcyclohexadien-\u200b1-\u200bylidene\u200b-\u200bN-\u200bethyl-\u200bEthanaminium Inner Salt Potassium Salt