293311 Phenaxone (Antipyrin), Its Derivatives
293319 Other Nitrogen Compounds Containing Unfused Pyrazole Ring System
293321 Hydantoin and Its Derivatives
293329 Other Nitrogen Compounds Containing Unfused Imidazole Ring System
293331 Pyridine and Its Salts
293339 Other Nitrogen Compounds Containing Unfused Pyridine Ring System
293340 Nitrogen Compounds Containing a Quinoline or Isoquinoline Ring System
293351 Malonylurea (Barbituric Acid) and Its Derivatives, Salts Thereof
293359 Other Nitrogen Compounds Containing a Pyrimidine Ring or Piperazine Ring System
293361 Melamine
293369 Other Nitrogen Compounds Containing Unfused Triazine Ring System
293371 6-hexanelactam (Epsilon-caprolactam)
293379 Other Lactams
293390 Other Heterocyclic Compounds With Nitrogen Hetero-atom Only
