3'-Amino-2'-(benzyloxy)-[1,1'-biphenyl]-3-carboxylic acid ; Eltrombopag Impurity 54;[1,1`-Biphenyl]-3-carboxylic acid, 3`-amino-2`-(phenylmethoxy);3`-Amino-2`-(phenylmethoxy)[1,1`-biphenyl]-3-carboxylic acid;