4-(Dihydroxyboronyl)benzoic acid, 4-(Dihydroxyboryl)benzoic acid, 4-Boronobenzoic acid, 4-Carboxybenzeneboronic acid, 4-Carboxylphenylboronic acid, 4-Hydroxycarbonylphenyl boronic acid, NSC 221170, p-Boronobenzoic acid, p-Carboxybenzeneboronic acid, p-Carboxyphenylboronic acid,Eltrombopag Building Blocks