Heterocyclic compounds with nitrogen heteroatom[s] only, containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure (excl. malonylurea "barbituric acid" and its derivatives, allobarbital "inn", amobarbital "inn", barbital "inn", butalbital "inn", butobarbital "inn", cyclobarbital "inn", methylphenobarbital "inn", pentobarbital "inn", phenobarbital "inn", secbutabarbital "inn", secobarbital "inn", vinylbital "inn", loprazolam "inn", mecloqualone "inn", methaqualone "inn" and zipeprol "inn", and salts thereof)