Dihydrogen(ethyl)[4-[alpha-[4-[ethyl(3-sulphonatobenzyl)amino]phenyl]-2-sulphonatobenzylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium,potassium sodium salt
Dihydrogen(ethyl)[4-[alpha-[4-[ethyl(3-sulphonatobenzyl)amino]phenyl]-2-sulphonatobenzylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium,potassium sodium salt