Heterocyclic compounds with nitrogen heteroatom[s] only, containing an unfused triazine ring, whether or not hydrogenated, in the structure (excl. melamine, atrazine "iso", propazine "iso", simazine "iso", hexahydro1,3,5trinitro1,3,5triazine "hexogen, trimethylenetrinitramine", methenamine [inn] "hexamethylenetetramine" and 2,6ditertbutyl4[4,6bis"octylthio"1,3,5triazine2ylamino]phenol)