Axitinib Impurity-6

2,2'-Dithiobisbenzoic Acid; bis(2-Carboxyphenyl) Disulfide; bis(o-Carboxylphenyl) Disulfide; Dithiosalicylic Acid; Thimerosal Related Compound A; o,o'-Dithiodibenzoic Acid; 2-[(2-Carboxyphenyl)disulfanyl]benzoic Acid; Diphenyl Disulfide-2,2'-dicarboxylic Acid; 2,2'-Disulfanediyldibenzoic Acid