Lactones n.e.c., heterocyclic compounds with nitrogen hetero-atom(s), containing an unfused pyrazole, pyrimidine, piperazine, unfused triazine ring or a phenothiazine ring system not further fused, hydantoin, its derivatives
Laktoni, d. n., heterociklične spojine z dušikovimi heteroatomi z nekondenziranim pirazolovim, pirimidinskim, piperazinskim, triazinskim ali naprej nekondenziranim fenotiazinovim obročem, hidantoin, njegovi derivati