7521-41-7

Basic information

• Product Name: 2-Amino-3-pyridinecarboxaldehyde
• Synonyms: 2--3- aMinopyridineforMaldehyde;2-Aminopyridine-3-carboxaldehyde,98%;2-Amino-3-pyridinecarboxaldehyde 97%;2-AMINO-3-FORMYLPYRIDINE;2-AMINO-3-PYRIDINECARBOXALDEHYDE;2-AMINONICOTINALDEHYDE;2-AMINO-PYRIDIN-3-CARBALDEHYDE;2-AMINO-PYRIDINE-3-CARBALDEHYDE
• CAS NO: 7521-41-7
• Molecular Formula: C₆H₆N₂O
• Molecular Weight: 122.12
• EINECS: -0
• Product Categories: C1 to C6;Carbonyl Compounds;Chemical Synthesis;Heterocyclic Building Blocks;Organic Building Blocks;Heterocycle-Pyridine series;Pyrimidines;FINE Chemical & INTERMEDIATES;Pyridine;pharmacetical;Pyridine series;Pyridines;C6;Heterocyclic Building Blocks;Aldehydes;Building Blocks
• Mol File: 7521-41-7.mol
• Article Data: 28

Chemical Properties

• Melting Point: 98-102 °C(lit.)
• Boiling Point: 290.7 °C at 760 mmHg
• Flash Point: >300℃
• Appearance: Yellow to light brown/Powder, Crystals and/or Chunks
• Density: 1.264 g/cm³
• Vapor Pressure: 0.00204mmHg at 25°C
• Storage Temp.: Refrigerator (+4°C)
• Solubility: Chloroform (Slightly), Methanol (Slightly)
• PKA: 4.99±0.36(Predicted)
• Water Solubility: insoluble
• Sensitive: Air Sensitive
• BRN: 109598
• CAS DataBase Reference: 2-Amino-3-pyridinecarboxaldehyde(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Amino-3-pyridinecarboxaldehyde(7521-41-7)
• EPA Substance Registry System: 2-Amino-3-pyridinecarboxaldehyde(7521-41-7)

Safety Data

• Hazard Codes: Xi,Xn
• Statements: 36/37/38-20/21/22
• Safety Statements: 26-36-36/37/39
• WGK Germany: 3
• HazardClass: IRRITANT
• PackingGroup: II
• Hazardous Substances Data: 7521-41-7(Hazardous Substances Data)

Usage

Chemical Properties

yellow crystals

Uses

2-Aminonicotinaldehyde is commonly employed as a starting material for a wide variety of N-heterocyclic compounds (e.g. β-nicotyrine [N445000]) . 2-Aminonicotinaldehyde is also used as a reagent to synthesize hydrazones (e.g.thionaphthenquinone 3-hydrazone [T367720]), which possess antituburcular properties.

InChI:InChI=1/C6H6N2O/c7-6-5(4-9)2-1-3-8-6/h1-4H,(H2,7,8)/p+1

Synthetic route

N-(3-formyl-2-pyridinyl)-2,2-dimethylpropanamide (86847-64-5) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Stage #1: N-(3-formyl-2-pyridinyl)-2,2-dimethylpropanamide With hydrogenchloride In water for 18h; Heating / reflux; Stage #2: With potassium carbonate In water at 20℃; pH=7;	100%
With hydrogenchloride for 4h; Heating;	93%
With hydrogenchloride In water

2-(pivaloylamino)pyridine (86847-59-8) + N,N-dimethyl-formamide (68-12-2, 33513-42-7) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multistep reaction;	84%

(2-amino-3-pyridinyl)methanol (23612-57-9) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With manganese(IV) oxide In dichloromethane at 20℃;	83%
With manganese(IV) oxide In dichloromethane at 20℃;	83%
With manganese(IV) oxide In dichloromethane at 20℃; for 18h;

2-<3-(dibromomethyl)-2-pyridinyl>-1H-isoindole-1,3(2H)-dione (114858-36-5) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Stage #1: 2-<3-(dibromomethyl)-2-pyridinyl>-1H-isoindole-1,3(2H)-dione With ammonia In ethanol; water at 4 - 20℃; for 1.16667h; Stage #2: With hydrogenchloride In water for 3h; Heating / reflux;	70%
Multi-step reaction with 2 steps 1: NH4OH / ethanol 2: 65 percent / HCl(conc) / 3 h / Heating View Scheme

2-(3-Iminomethyl-pyridin-2-yl)-isoindole-1,3-dione (114858-37-6) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride for 3h; Heating;	65%

2-tert-butylamino-pyridine-3-carbaldehyde (855313-30-3) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride	52%

3-cyano-1-methylpyridinium iodide (1004-16-6) → pyridine-3-carbonitrile (100-54-9) + 2-Aminonicotinaldehyde (7521-41-7) + 2-methylamino-3-pyridinecarboxaldehyde (32399-08-9)

Conditions	Yield
With ammonium hydroxide at 180℃; for 35h;	A 45% B 6% C 8%

2--3-pyridinecarboxaldehyde (116026-94-9) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With trifluoroacetic acid In dichloromethane at 20℃; Inert atmosphere;	40%

2-(3-pyridyl)-1,3,8-triazanaphthalene (7521-27-9) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride In water for 1h;	38%
With hydrogenchloride at 100℃;	38%
With hydrogenchloride In water for 4h; Reflux; Inert atmosphere;	30%

nicotinamide (98-92-0) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Stage #1: nicotinamide With ammonium sulfamate at 150 - 200℃; for 9h; Stage #2: With ammonia In water for 1h; Stage #3: With hydrogenchloride for 4h; Heating;	11%
Multi-step reaction with 2 steps 1: ammonium sulfamate / 11 h / 150 - 200 °C 2: 2 N HCl, water / 4 h / Heating View Scheme
Stage #1: nicotinamide With hydrogenchloride; ammonium sulphamate In water Stage #2: With sodium hydroxide

2-amino-nicotinic acid isopropylidenehydrazide → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With ammonium hydroxide; sodium periodate

N-[4-(2-amino-[3]pyridyl)-but-3-enyl]-N-methyl-acetamide → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride; ozone

pyridine-3-carbonitrile (100-54-9) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride; water for 4h; Heating; Yield given;

2-aminopyridine (504-29-0) + ethyl halide → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 3 steps 1: 67 percent / DIEA / CH2Cl2 2: 95 percent / LDA 3: 52 percent / aq. HCl View Scheme

N-tert-butyl-2-aminopyridine (76293-30-6) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 2 steps 1: 95 percent / LDA 2: 52 percent / aq. HCl View Scheme

2-aminopyridine (504-29-0) + Fmoc-L-Tyr(OtBu)-Wang resin → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 2 steps 1: 94 percent / Et3N / various solvent(s) / 2 h / 20 °C View Scheme

3-methylpyridin-2-ylamine (1603-40-3) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 4 steps 1: 93 percent / 190 °C 2: 86.6 percent / NBS, AIBN / CCl4 / Heating 3: NH4OH / ethanol 4: 65 percent / HCl(conc) / 3 h / Heating View Scheme

2-(3-methyl-2-pyridinyl)-1H-isoindole-1,3(2H)-dione (64959-77-9) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 3 steps 1: 86.6 percent / NBS, AIBN / CCl4 / Heating 2: NH4OH / ethanol 3: 65 percent / HCl(conc) / 3 h / Heating View Scheme

2-aminopyridine (504-29-0) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 3 steps 1: 79 percent / triethylamine / CH2Cl2 / 2 h / Ambient temperature 2: 1) n-BuLi, 2) 6 N HCl / THF, hexane 1.) 0 degC, 4h, 2) -78 deg C to room temp. 3: 93 percent / 3 N aqueous HCl / 4 h / Heating View Scheme
Multi-step reaction with 3 steps 1.1: tert-butyl alcohol / 30 - 40 °C / Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / -78 °C / Inert atmosphere 2.2: -78 - -20 °C / Inert atmosphere 2.3: -78 - 20 °C / Inert atmosphere 3.1: trifluoroacetic acid / dichloromethane / 20 °C / Inert atmosphere View Scheme
Multi-step reaction with 3 steps 1: triethylamine 2: n-butyllithium 3: hydrogenchloride / water View Scheme

2-(pivaloylamino)pyridine (86847-59-8) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 2 steps 1: 1) n-BuLi, 2) 6 N HCl / THF, hexane 1.) 0 degC, 4h, 2) -78 deg C to room temp. 2: 93 percent / 3 N aqueous HCl / 4 h / Heating View Scheme
Multi-step reaction with 2 steps 1: n-butyllithium 2: hydrogenchloride / water View Scheme

2-aminonicotinic acid hydrazide (5327-31-1) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 2 steps 2: aqueous NH3; NaIO4 View Scheme

N-(tert-butoxycarbonyl)-2-aminopyridine (38427-94-0) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
Multi-step reaction with 2 steps 1.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / -78 °C / Inert atmosphere 1.2: -78 - -20 °C / Inert atmosphere 1.3: -78 - 20 °C / Inert atmosphere 2.1: trifluoroacetic acid / dichloromethane / 20 °C / Inert atmosphere View Scheme

2-Nitro-nicotinaldehyd (5175-26-8) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride

2-(3'-pyridyl)pyrido[2,3-d]pyrimidine (1035796-03-2) → 2-Aminonicotinaldehyde (7521-41-7)

Conditions	Yield
With hydrogenchloride for 8h; Reflux;

2-Aminonicotinaldehyde (7521-41-7) + cyanoacetic acid amide (107-91-5) → 2-Amino-1,8-naphthyridine-3-carboxamide (15935-96-3)

Conditions	Yield
With piperidine at 20℃; for 0.166667h; Friedlander condensation;	100%

2-Aminonicotinaldehyde (7521-41-7) + malonodiamide (108-13-4) → 2-Amino-1,8-naphthyridine-3-carboxamide (15935-96-3)

Conditions	Yield
With piperidine In methanol for 0.0333333h; Friedlander condensation; microwave irradiation;	100%

2-Aminonicotinaldehyde (7521-41-7) + cyclopentanone (120-92-3) → 7,8-dihydro-6H-cyclopenta[b]-1,8-naphthyridine (58309-27-6)

Conditions	Yield
With ytterbium(III) triflate at 20℃; for 1h; Friedlaender reaction;	100%
With 1-butyl-3-methylimidazolium methoxide at 70℃; for 23h; Inert atmosphere;	90%
With sodium hydrogensulfate on silicagel In neat (no solvent) at 80℃; for 0.533333h; Friedlaender Quinoline Synthesis; Green chemistry;	85%
With Poly(2-acrylamido-2-methylpropanesulfonic acid-co-acrylic acid) In neat (no solvent) at 110℃; for 0.666667h; Friedlaender Quinoline Synthesis; Green chemistry;	82%

2-Aminonicotinaldehyde (7521-41-7) + acetone (67-64-1) → 2-methyl-[1,8]naphthyridine (1569-16-0)

Conditions	Yield
With L-proline	99%
With L-proline In ethanol for 16h; Reflux;	99%
With L-proline In ethanol Reflux;	99%

2-Aminonicotinaldehyde (7521-41-7) + pyruvic acid methyl ester (600-22-6) → 1,8-naphthyridine-2-carboxylic acid (215523-34-5)

Conditions	Yield
With sodium hydroxide In ethanol; water at 20℃; for 16h; Cooling;	99%
With water; sodium hydroxide In ethanol at 0 - 20℃; for 18h;

2-Aminonicotinaldehyde (7521-41-7) + o-hydroxyacetophenone (118-93-4) → 2-(2-hydroxyphenyl)-1,8-naphthyridine (65182-56-1)

Conditions	Yield
With potassium hydroxide In methanol at 65℃; for 7h;	98%
With potassium hydroxide for 0.05h; microwave irradiation;	90%
With potassium hydroxide In methanol; water at 60℃; Friedlaender Quinoline Synthesis;	82%
With sulfuric acid In acetic acid for 3h; Heating;	78%
With potassium hydroxide In ethanol for 4h; Heating;

2-Aminonicotinaldehyde (7521-41-7) + N-phenylacetoacetamide (102-01-2) → 2-methyl-N-phenyl-1,8-naphthyridine-3-carboxamide (112697-61-7)

Conditions	Yield
With lithium chloride for 0.0833333h; Friedlaender condensation; microwave irradiation;	98%
With toluene-4-sulfonic acid at 20℃; for 5h; Friedlander condensation;	92%
With zirconyl chloride octahydrate In neat (no solvent, solid phase) at 70 - 80℃; for 0.15h;	92%

2-Aminonicotinaldehyde (7521-41-7) + acetylacetone (123-54-6) → 1-(2-methyl-1,8-naphthyridin-3-yl)ethan-1-one (5174-87-8)

Conditions	Yield
With charcoal MgO In neat (no solvent) at 49.84℃; for 1h; Temperature; Friedlaender Quinoline Synthesis; Green chemistry;	98%
With piperidine at 20℃; for 0.333333h; Friedlander condensation;	96%
With sodium hydrogensulfate on silicagel In neat (no solvent) at 80℃; Solvent; Temperature; Friedlaender Quinoline Synthesis; Green chemistry;	96%

2-Aminonicotinaldehyde (7521-41-7) + malononitrile (109-77-3) → 2-amino-3-cyano-1,8-naphthyridine (15935-95-2)

Conditions	Yield
With piperidine at 20℃; for 0.0333333h; Friedlander condensation;	98%
piperidine In ethanol	95%

2-Aminonicotinaldehyde (7521-41-7) + p-methoxybenzylnitrile (104-47-2) → 2-amino-3-(p-methoxyphenyl)-1,8-naphthyridine (60467-64-3)

Conditions	Yield
With piperidine at 20℃; for 0.133333h;	98%
With potassium hydroxide Microwave irradiation;
With piperidine In neat (no solvent) at 20℃;

2-Aminonicotinaldehyde (7521-41-7) + cyanoacetic acid amide (107-91-5) → 2-amino-3-cyano-1,8-naphthyridine (15935-95-2)

Conditions	Yield
With piperidine In methanol for 0.00833333h; Friedlander condensation; microwave irradiation;	98%

2-Aminonicotinaldehyde (7521-41-7) + 1,1′-(pyrazine-2,5-diyl)diethanone (39248-49-2) → 2,5-di-(1′,8′-dinaphthyridin-2′-yl)pyrazine

Conditions	Yield
With potassium hydroxide In ethanol for 5h; Friedlaender condensation; Heating;	98%

2-Aminonicotinaldehyde (7521-41-7) + 3-chloro-benzeneacetonitrile (1529-41-5) → 2-amino-3-(m-chlorophenyl)-1,8-naphthyridine (756500-63-7)

Conditions	Yield
With potassium hydroxide for 0.0333333h; microwave irradiation;	98%
With piperidine In neat (no solvent) Milling; Green chemistry;

2-Aminonicotinaldehyde (7521-41-7) + Cyclopropyl methyl ketone (765-43-5) → 2-(cyclopropyl)-1,8-naphthyridine

Conditions	Yield
With sodium hydroxide In ethanol; water for 1h; Friedlaender reaction; Heating;	98%

2-Aminonicotinaldehyde (7521-41-7) + 2-Chlorophenylacetonitrile (2856-63-5) → 2-amino-3-(o-chlorophenyl)-1,8-naphthyridine (845533-60-0)

Conditions	Yield
With sodium hydroxide for 0.0333333h; microwave irradiation;	98%

2-Aminonicotinaldehyde (7521-41-7) + 4-Bromophenylacetonitrile (16532-79-9) → 2-amino-3-(p-bromophenyl)-1,8-naphthyridine (883564-47-4)

Conditions	Yield
With potassium hydroxide for 0.0416667h; microwave irradiation;	98%
With piperidine In neat (no solvent) Milling; Green chemistry;
With piperidine In neat (no solvent) at 20℃;

2-Aminonicotinaldehyde (7521-41-7) + 4-Nitrophenylacetonitrile (555-21-5) → 2-amino-3-(p-nitrophenyl)-1,8-naphthyridine (60467-62-1)

Conditions	Yield
With potassium hydroxide for 0.025h; microwave irradiation;	98%
With piperidine In neat (no solvent) Milling; Green chemistry;
With piperidine In neat (no solvent) at 20℃;

2-Aminonicotinaldehyde (7521-41-7) + 7,8,9,10-tetrahydroazepino[2,1-b]quinazoline-6,12-dione → 3,2'-trimethylene-2-(1,8-naphthydrid-2-yl)-4(3H)-quinazolinone

Conditions	Yield
With potassium hydroxide In ethanol Friedlaender condensation; Heating;	98%

2-Aminonicotinaldehyde (7521-41-7) + 2-Acetylthiazole (24295-03-2) → 2-(1,8-naphthyridin-2-yl)thiazole (170439-30-2)

Conditions	Yield
With potassium hydroxide In methanol; water at 60℃;	98%
With potassium hydroxide In methanol at 60℃; Inert atmosphere; Schlenk technique; Reflux;	82%
With potassium hydroxide In methanol	46%

2-Aminonicotinaldehyde (7521-41-7) + 3-fluorophenylacetonitrile (501-00-8) → 2-amino-3-(3-fluorophenyl)-1,8-naphthyridine (1082419-13-3)

Conditions	Yield
With potassium hydroxide In water for 0.0416667h; Microwave irradiation;	98%

2-Aminonicotinaldehyde (7521-41-7) + 2-fluorophenyl acetonitrile (326-62-5) → 2-amino-3-(2-fluorophenyl)-1,8-naphthyridine (1082583-45-6)

Conditions	Yield
With potassium hydroxide for 0.0333333h; Microwave irradiation; Neat (no solvent);	98%

2-Aminonicotinaldehyde (7521-41-7) + 4-fluorophenylacetonitrile (459-22-3) → 2-amino-3-(4-fluorophenyl)-1,8-naphthyridine (60467-61-0)

Conditions	Yield
With potassium hydroxide Microwave irradiation;	98%
With piperidine In neat (no solvent) Milling; Green chemistry;
With piperidine In neat (no solvent) at 20℃;

2-Aminonicotinaldehyde (7521-41-7) + methyl 3-oxohexanoate (30414-54-1) → 2-propyl-1,8-naphthyridine-3-carboxylic acid (1609489-37-3)

Conditions	Yield
In toluene at 110℃; for 24h; Friedlaender Quinoline Synthesis; Inert atmosphere;	98%

2-Aminonicotinaldehyde (7521-41-7) + Ethyl 3-cyclopropyl-3-oxopropionate (24922-02-9) → 2-cyclopropyl-[1,8]-naphthyridine-3-carboxylic acid ethyl ester (1208990-49-1)

Conditions	Yield
With sodium hydrogensulfate on silicagel In neat (no solvent) at 80℃; for 0.666667h; Friedlaender Quinoline Synthesis; Green chemistry;	98%

2-Aminonicotinaldehyde (7521-41-7) + 3-trifluoromethylphenylacetonitrile (2338-76-3) → 3-[3-(trifluoromethyl)phenyl][1,8]naphthyridin-2-amine (1082325-94-7)

Conditions	Yield
With potassium hydroxide for 0.0416667h; Microwave irradiation;	98%

2-Aminonicotinaldehyde (7521-41-7) + 1-(6-methoxypyridin-2-yl)ethan-1-one (21190-93-2) → 2-(6-methoxypyridin-2-yl)-1,8-naphthyridine

Conditions	Yield
With potassium hydroxide In ethanol at 60℃; for 4h; Inert atmosphere; Schlenk technique;	98%

Upstream product

• 500-22-1 3-pyridinecarboxaldehyde 
• 1603-40-3 3-methylpyridin-2-ylamine 
• 504-29-0 2-aminopyridine 
• 76293-30-6 N-tert-butyl-2-aminopyridine 
• 855313-30-3 2-tert-butylamino-pyridine-3-carbaldehyde 
• 98-92-0 nicotinamide 
• 86847-59-8 2-(pivaloylamino)pyridine 
• 68-12-2 N,N-dimethyl-formamide 
• 114858-37-6 2-(3-Iminomethyl-pyridin-2-yl)-isoindole-1,3-dione 
• 86847-64-5 N-(3-formyl-2-pyridinyl)-2,2-dimethylpropanamide 
• 1004-16-6 3-cyano-1-methylpyridinium iodide 
• 100-54-9 pyridine-3-carbonitrile 
• 5175-26-8 2-Nitro-nicotinaldehyd 
• 5327-31-1 2-aminonicotinic acid hydrazide 

Downstream Products

• 60467-71-2 2-(3-pyridyl)-1,8-naphthyridine 
• 848841-99-6 N-[1-(4-Methoxy-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-03-5 N-[1-(2-Bromo-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-04-6 N-[1-(4-Nitro-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-02-4 N-[1-(2,4-Dichloro-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-06-8 N-benzo[1,3]dioxol-5-ylmethylene-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-05-7 N-[1-(3,4-Dimethoxy-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-00-2 N-[1-(2-Chloro-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848841-98-5 N-(4-methyl-benzylidene)-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848842-01-3 N-[1-(4-Chloro-phenyl)-meth-(Z)-ylidene]-N'-[3-(4-nitro-phenyl)-[1,8]naphthyridin-2-yl]-hydrazine 
• 848841-97-4 benzaldehyde 3-(p-nitrophenyl)-1,8-naphthyridin-2-ylhydrazone 
• 848842-17-1 1,2-dihydro-3-(p-nitrophenyl)-1,8-naphthyridin-2-one 
• 848842-18-2 2-chloro-3-(p-nitrophenyl)-1,8-naphthyridine 
• 848842-19-3 2-hydrazino-3-(p-nitrophenyl)-1,8-naphthyridine 

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