2-Naphthalenecarboxylic acid, 4-(2-carboxyethenyl)-3-((10-(2-carboxyethenyl)-4-oxo-4H-naphtho(2,3-d)-1,3,2-dioxantimonin-2-yl)oxy)-, trisodium salt 77772-15-7 Antimonyl-2-hydroxy-3-carboxy-1-sodium acrylate naphthalein