Synonyms: Phthalexon S;Phthalexon-S;AC1MIYOJ;34958-53-7 (tetra-hydrochloride salt);2-[[6-[3-[6-[bis(carboxymethyl)amino]-2-hydroxy-6-bicyclo[3.1.1]hepta-3,5(7)-dienyl]-1,1-dioxo-2,1;Glycine, N,N'-(3H-2,1-benzoxathiol-3-ylidenebis((6-hydroxy-3,1-phenylene)methylene))bis(N-(carboxymethyl)-, S,S-dioxide