Bensenderivat, där en eller fler väteatomer på bensenringen ersatts av bromatomer.

I'm sorry for the confusion, but "Brombensener" doesn't seem to be a recognized medical term in English or any other language I am familiar with. It is possible that there may be a spelling mistake or it could be a term specific to a certain language or dialect. Could you please provide more context or check the spelling? I would be happy to help further if I can.