1,3-Naphthalenedicarboxylic acid, 2-((10-carboxy-4-oxo-4H-naphtho(2,3-d)-1,3,2-dioxantimonin-2-yl)oxy)-, trisodium salt 77772-16-8 Antimonyl-2-hydroxy-1,3-sodium dicarboxy naphthalein