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Heterocyclic compounds with nitrogen heteroatom(s) only (1) Phenazone (antipyrin) and its derivatives (2) 3-carboxy (para-sulphophenyl) 5 pyrazolone (3) 1(2.5 dichloro-4-sulphophenyl) –3 – methyl- Deleted 110 5-pyrazolone (4) 3-methyl-1 (4-sulpho-O-toluyl-5-pyrazolone) (5) Phenyl-methyl pyrazolone (6) 1-phenyl-5-pyrazolone-3-carboxylic acid ethylester (7) 1-(m-sulphophenyl) –3-pyrazolone (8) Analgin (9) Oxphenbutazone (10) Hydantoin and its derivatives (11) Tinidazole (12) Metronidazole metronidazone/benzoate (13) Mebendazole (14) Dimetridazole (15) Albendazole (16) Pyradine (17) Piperidine and its salts (18) Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN), fentanyl (INN), keto bemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) inermediate A, phencyclidine (INN) (PCP), phenoperidine (INN), pipradrol (INN), piritramide (INN), propiram (INN) and trimeperidine (INN); salts thereof (19) Amino pyridine (20) Alpha picoline (2-methyl pyridine) (21) Gamma picoline (4-methyl pyridine) (22) Chlorpheniramine maleate (23) Diphenoxylate hydrochloride (24) Beta picoline (3-methyl pyridine) (25) Morpholine (26) Lutidine (Dimethyl pyridine) (27) Piperidine and its derivatives (28) Levorphanol (INN) and its salts (29) Malonylurea (barbituric acid) and its salts (30) Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital (INN), cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), secbutabarbital (INN), Phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof (31) Other derivatives of malonylurea (barbituric acid); salts thereof (32) Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof (33) Aminophylline (cordophyline) (34) Trimethoprim (35) Diethyl carbanazine citrate (36) 1- Amino-4 Methyl Piperazine (37) Melamine (38) Cynuric acid and its salts (39) 6- Hexanelactam (Epsilon Caprolactam) (40) Clobazam (INN) and methyprylon (INN) (41) Other lactams (42) Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), 111 chlorazepate, declorazepam (INN), fludiaepam (INN), flunitrazepam (INN), flurazepam (INN), halazepam (INN), lorazepam (INN), lormetazepam (INN), mazindol (INN), medazepam (INN), medazolam (INN), nimetazepam (INN), nitrazepam (INN), pinazepam (INN), prazepam (INN), pyrovalerone (INN), temazepam (INN), tetrazepam (INN) and triazolam (INN); salts thereof