pentasodium N-[5-[[4-[[3-[(aminocarbonyl)amino]-4-[(3,6,8-trisulfonatonaphthalen-2-yl)azo]phenyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]-2-sulfonato-4-[[4-[[-2-(oxysulfonato)ethyl] sulfonyl]phenyl]azo]phenyl]-3-aminopropanoic acid