9-[(2-Methoxyphenyl)amino]-7-phenyl-5-(phenylamino)-4-(sodiooxysulfonyl)-10-sulfonatobenzo[a]phenazin-7-ium

hydrogen 9-[(2-methoxyphenyl)amino]-7-phenyl-5-(phenylamino)-4,10-disulphonatobenzo[a]phenazinium, sodium salt