There was an error running the query [insert into queries_english (query) values ('3,3'-diaminobenzidine') on duplicate key update repetitions=repetitions+1, last=now() - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '') on duplicate key update repetitions=repetitions+1, last=now()' at line 1]3,3'-Diaminobenzidine. Medical search. Wikipedia