2-Naphthalenesulfonamide,N,N-diethyl-4-[[3-[[[5-(hexadecyloxy)-2-hydroxy-3-(1,1,3,3-tetramethylbutyl)phenyl]amino]sulfonyl]-4-(2-methoxyethoxy)phenyl]azo]-1-hydroxy-5-[(methylsulfonyl)amino]-