Nome Químico: 2′-[(3-Carboxy-4-hydroxyphenyl)diazenyl]-4,5′-dihydroxybiphenyl-3,4′-dicarboxylic acid, (as per EP)
Sorrisos: O=C(O)C1=CC(/N=N/C2=C(C3=CC(C(O)=O)=C(O)C=C3)C=C(O)C(C(O)=O)=C2)=CC=C1O
Inchi: InChI=1S/C15H12N2O8S/c18-12-3-1-8(5-10(12)14(20)7-26(23,24)25)16-17-9-2-4-13(19)11(6-9)15(21)22/h1-6,18-19H,7H2,(H,21,22)(H,23,24,25)/b17-16+