4-Carboxy-2-chlorophenylboronic acid (CAS NO.851335-09-6), its Synonyms are 4-Borono-3-chlorobenzoic acid ; (4-Carboxy-2-chloro)benzeneboronic acid ; 2-Chloro-4-carboxyphenylboronic acid ; 4-Carboxy-2-chlorobenzeneboronic acid 97% ; 2-chloro-4-chlorobenzeneboronic acid .