2933 — Heterocyclic compounds with nitrogen hetero-atom(s) only

Codes under heading 2933

• - Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure:
• - Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure:
• - Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure:
• - Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused:
• - Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure:
• - Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure:
• - Lactams:
• - Other: