Organic chemicals heterocyclic compounds with nitrogen heteroatom (s) exclusively. alobarbital (dci), amobarbital (dci), barbital (dci), butalbital, butobarbital, cyclobarbital (dci), phenobarbital (dci), methylphenobarbital (dci), pentobarbital ( dci), secbutabarbital (dci), secobarbital (dci) and