tetrasodium 1-(3-aminophenyl)-4-[4-[[4-[[4-[[4-[[1-(3-aminophenyl)-3-carboxylato-5-oxo-4H-pyrazol-4-yl]azo]benzoyl]amino]-3-sulfonato-phenyl]carbamoylamino]-2-sulfonato-phenyl]carbamoyl]phenyl]azo-5-oxo-4H-pyrazole-3-carboxylate