Nitric oxide synthases (NOSs) are a family of enzymes catalyzing the production of nitric oxide (NO) from L-arginine. NO synthases catalyze the oxidation of L-arginine to NO and L-citrulline. Mammals contain three NOS isoforms: neuronal NOS (nNOS), inducible NOS (iNOS), and endothelial NOS (eNOS). NO produced from these different NOS isoforms is involved in a wide range of physiologic functions in the nervous, immune, and cardiovascular systems. Unregulated NO production can lead to pathologic conditions such as stroke, inflammation, and hypertension. Therefore, the control of NOS activity by isoform selective NOS inhibitors has great potential for therapeutic treatments of NO-related diseases.


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L-Arginine-1-13C hydrochloride

L-Arginine-1-13C ((S)-(+)-Arginine-1-13C) hydrochloride is the 13C-labeled L-Arginine hydrochloride. L-Arginine hydrochloride ((S)-(+)-Arginine hydrochloride) is the nitrogen donor for synthesis of nitric oxide, a potent vasodilator that is deficient during times of sickle cell crisis.

  • CAS Number: 2483735-41-5
  • MF: C513CH15ClN4O2
  • MW: 211.65
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Shanciol B

Shanciol B, isolated from the ethyl acetate extract of the air-dried whole plant of Pholidota imbricate Hook, inhibits nitric oxide (NO) production and 1,1-diphenyl-2-picrylhydrazil (DPPH) radical scavenging activity[1]. Shanciol B is a microsomal prostaglandin E synthase-1 (mPGES-1) inhibitor with anti-inflammatory activity[2].

  • CAS Number: 208106-53-0
  • MF: C25H26O6
  • MW: 422.47
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

3-epi-betulinic acid

Epibetulinic acid, isolated from the root bark of Maytenus cuzcoina and the leaves of Maytenus chiapensis, exhibits potent inhibitory effects on NO and prostaglandin E2 (PGE2) production in mouse macrophages (RAW 264.7) stimulated with bacterial endotoxin with IC50s of 0.7 and 0.6 μM, respectively. Anti-inflammatory activity[1].

  • CAS Number: 38736-77-5
  • MF: C30H48O3
  • MW: 456.700
  • Catalog: Prostaglandin Receptor
  • Density: 1.1±0.0 g/cm3
  • Boiling Point: 550.0±0.0 °C at 760 mmHg
  • Melting Point: 277℃
  • Flash Point: 300.5±0.0 °C

Nitric oxide production-IN-1

Nitric oxide production-IN-1(Compound 1) is a inhibitor of NO Production which isolated from Tupistra chinensis. Nitric oxide production-IN-1(Compound 1) inhibits NO production in rat abdomen macrophages induced by lipopolysaccharide[1]

  • CAS Number: 1013405-26-9
  • MF: C33H52O15
  • MW: 688.76
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

DETA-NONOate

NOC 18 is a nitric oxide donor and activates an inward current in cultured rat cerebellar granules cells. NOC 18 increases cGMP production in cultured vascular smooth muscle cells. NOC 18 reduces contractility of cardiac muscle preparations in vitro.

  • CAS Number: 146724-94-9
  • MF: C4H13N5O2
  • MW: 163.178
  • Catalog: NO Synthase
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 303.0±52.0 °C at 760 mmHg
  • Melting Point: 98-106ºC
  • Flash Point: 137.1±30.7 °C

Isoferulic acid

trans-Isoferulic acid (trans-3-Hydroxy-4-methoxycinnamic acid) is an aromatic acid isolated from the roots of Clematis florida var. plena. trans-Isoferulic acid exhibits anti-inflammatory activity[1].trans-isoferulic acid suppresses NO and PGE2 production through the induction of Nrf2-dependent heme oxygenase-1 (HO-1)[2].

  • CAS Number: 25522-33-2
  • MF: C10H10O4
  • MW: 194.184
  • Catalog: Prostaglandin Receptor
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 410.2±35.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 167.6±19.4 °C

hnNOS-IN-3

hnNOS-IN-3 (compound 39) is a selective nNOS inhibitor, with a Ki of 0.32 μM. The nNOS binding of hnNOS-IN-3 is competitive with L-arginine. The selectivity of hnNOS-IN-3 for nNOS versus iNOS (Ki=37 μM) and eNOS (Ki=9.4 μM) is 115-fold and 29-fold, respectively[1].

  • CAS Number: 163490-78-6
  • MF: C10H12ClF3N2S
  • MW: 284.73
  • Catalog: NO Synthase
  • Density: 1.27 g/cm3
  • Boiling Point: 322.3ºC at 760 mmHg
  • Melting Point: 143-147ºC
  • Flash Point: 148.8ºC

Atraric acid

Atraric acid (Methyl atrarate) is a specific androgen receptor (AR) antagonist with anti-inflammatory and anticancer effects. Atraric acid represses the expression of the endogenous prostate specific antigen gene in both LNCaP and C4-2 cells. Atraric acid can also inhibit the synthesis of NO and cytokine, and suppress the MAPK-NFκB signaling pathway. Atraric acid can be used to research prostate diseases and inflammatory diseases[1][2].

  • CAS Number: 4707-47-5
  • MF: C10H12O4
  • MW: 196.200
  • Catalog: NO Synthase
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 360.7±22.0 °C at 760 mmHg
  • Melting Point: 141-146 °C(lit.)
  • Flash Point: 143.9±15.8 °C

multiflorin B

Multiflorin B (compound 5) is a kind of kaempferol glycoside. Multiflorin B can be isolated from the root of the fern Neocheiropteris palmatopedata. Multiflorin B inhibits nitric oxide production at a concentration of 20 μg/ml with an inhibition of 52%[1].

  • CAS Number: 52657-01-9
  • MF: C27H30O15
  • MW: 594.52
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

celiprolol

Celiprolol (REV 5320) is a potent, cardioselective and orally active β1-andrenoceptor r antagonist with partial β2 agonist activity, with Ki values of 0.14-8.3 μM. Celiprolol has antihypertensive and antianginal activity, and can be used for the research of cardiovascular disease such as high blood pressure[1][4].

  • CAS Number: 56980-93-9
  • MF: C20H33N3O4
  • MW: 379.494
  • Catalog: Adrenergic Receptor
  • Density: 1.1±0.1 g/cm3
  • Boiling Point: 586.5±50.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 308.5±30.1 °C

AR-C102222

AR-C102222 is a spirocyclic fluoropiperidine quinazoline selective iNOS inhibitor. AR-C102222 can be used for the research of neuropathic pain[1].

  • CAS Number: 253771-21-0
  • MF: C19H17ClF2N6O
  • MW: 418.828
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Dimaprit dihydrochloride

Dimaprit dihydrochloride is a selective histamine H2 receptor agonist, it also inhibits nNOS with an IC50 of 49 μM. Dimaprit dihydrochloride can stimulate gastric acid secretion[1][2].

  • CAS Number: 23256-33-9
  • MF: C6H17Cl2N3S
  • MW: 234.19000
  • Catalog: Histamine Receptor
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

L-Arginine-13C6 hydrochloride

L-Arginine-13C6 ((S)-(+)-Arginine-13C6) hydrochloride is the 13C-labeled L-Arginine hydrochloride. L-Arginine hydrochloride ((S)-(+)-Arginine hydrochloride) is the nitrogen donor for synthesis of nitric oxide, a potent vasodilator that is deficient during times of sickle cell crisis.

  • CAS Number: 201740-91-2
  • MF: 13C6H15ClN4O2
  • MW: 216.618
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Rubranol

Rubranol is an inhibitor of NO Synthase. Rubranol inhibits LPS-induced NO production in activated macrophages with 74% inhibition[1].

  • CAS Number: 211126-61-3
  • MF: C19H24O5
  • MW: 332.391
  • Catalog: NO Synthase
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 611.1±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 286.1±26.1 °C

Buddlejasaponin IV

Buddlejasaponin IV (BS‐IV) exerts anti-inflammatory and cytotoxic effects against cancer cells[1].

  • CAS Number: 139523-30-1
  • MF: C48H78O18
  • MW: 943.12200
  • Catalog: COX
  • Density: 1.43g/cm3
  • Boiling Point: N/A
  • Melting Point: 288-290 ºC
  • Flash Point: N/A

Isomaculosidine

Isomaculosidine is an alkaloid that can be isolated from D. dasycarpus. Isomaculosidine can inhibit nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated BV2 microglial cells[1].

  • CAS Number: 518-96-7
  • MF: C14H13NO4
  • MW: 259.257
  • Catalog: NO Synthase
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 434.3±45.0 °C at 760 mmHg
  • Melting Point: 168-170℃
  • Flash Point: 216.4±28.7 °C

ARL 17477 dihydrochloride

ARL-17477 is a dual inhibitor of NOS1and the autophagy-lysosomal system with anticancer activity and can inhibit tumor growth in KRAS-mutated cancers[1].

  • CAS Number: 866914-87-6
  • MF: C20H22Cl3N3S
  • MW: 442.83
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Morachalcone A

Morachalcone A is a naturally-occurring aromatase inhibitor (IC50=4.6 mM). Morachalcone A is also a plants metabolite with potential anti-inflammatory and anticancer activity. Morachalcone A inhibits Lipopolysaccharide (HY-D1056)-induced nitric oxide production[1][2][3].

  • CAS Number: 76472-88-3
  • MF: C20H20O5
  • MW: 340.37
  • Catalog: NO Synthase
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 605.0±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 333.7±28.0 °C

N-Acetyl-3-(nitrososulfanyl)valine

S-Nitroso-N-acetyl-DL-penicillamine (SNAP) is a nitric oxide donor and acts as a stable inhibitor of platelet aggregation[1][2][3][4].

  • CAS Number: 67776-06-1
  • MF: C7H12N2O4S
  • MW: 220.246
  • Catalog: NO Synthase
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: N/A
  • Melting Point: 151ºC
  • Flash Point: N/A

Ginsenoside Rb3

Ginsenoside Rb3 is extracted from steamed Panax notoginseng. Ginsenoside Rb3 exhibits inhibitory effect on TNFα-induced NF-κB transcriptional activity with an IC50 of 8.2 μM in 293T cell lines. Ginsenoside Rb3 also inhibits the induction of COX-2 and iNOS mRNA.

  • CAS Number: 68406-26-8
  • MF: C53H90O22
  • MW: 1079.269
  • Catalog: NO Synthase
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 1117.1±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 629.4±34.3 °C

Chloranthalactone E

Chloranthalactone E (compound 6), a labdane diterpene, can be isolated from the aerial parts of Chloranthus serratus. Chloranthalactone E inhibits NO production in LPS-activated RAW 264.7 macrophages[1].

  • CAS Number: 73215-92-6
  • MF: C15H18O4
  • MW: 262.301
  • Catalog: NO Synthase
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 458.8±45.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 175.6±22.2 °C

MSU-42011

MSU-42011 is an orally active retinoid X receptor (RXR) agonist. MSU-42011 inhibits the expression of iNOS and p-ERK protein. MSU-42011 has immunomodulatory and antitumor activity. MSU-42011 can be used for cancer research[1].

  • CAS Number: 2456434-36-7
  • MF: C24H34N2O2
  • MW: 382.54
  • Catalog: PERK
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Ciwujianoside C3

Ciwujianoside C3, an orally active and brain penetrated compound, is isolated the leaves of Acanthopanax henryi Harms. Ciwujianoside C3 has anti-inflammatory effect and can reinforces object recognition memory[1][2].

  • CAS Number: 114906-74-0
  • MF: C53H86O21
  • MW: 1059.24000
  • Catalog: NO Synthase
  • Density: 1.43±0.1 g/cm3(Predicted)
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

L-Arg(Me, Me)-OH (asymmetrical)

Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS), and functions as a marker of endothelial dysfunction in a number of pathological states.

  • CAS Number: 30315-93-6
  • MF: C8H18N4O2
  • MW: 202.25400
  • Catalog: NO Synthase
  • Density: 1.239g/cm3
  • Boiling Point: 372.555°C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 179.115°C

kadsulignan H

Kadsulignan H (compound 13) is a lignan with inhibitory activity on NO production. Kadsulignan H inhibits NO production in BV-2 cells with an IC50 of 14.1 μM[1].

  • CAS Number: 144049-91-2
  • MF: C26H30O8
  • MW: 470.51200
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Anti-inflammatory agent 55

Anti-inflammatory agent 55 (compound 9j) is a derivative of Coixol and has anti-inflammatory activity. Anti-inflammatory agent 54 inhibits the NF-κB pathway and downregulates the expression of iNOS, TNF-α, IL-6 and IL-1β. Anti-inflammatory agent 54 inhibits LPS-induced nitric oxide (NO) production in RAW264.7 macrophages (IC50: 0.8 μM) and exerts in vivo anti-inflammatory activity in a mouse auricular edema model[1].

  • CAS Number: 2924156-51-2
  • MF: C17H15N3O7
  • MW: 373.32
  • Catalog: Interleukin Related
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

3',4'-Dihydroxyflavonol

3',4'-Dihydroxyflavonol (DiOHF) is an effective antioxidant, which reduces superoxide and improves nitric oxide (NO) function in diabetic rat mesenteric arteries[1].

  • CAS Number: 6068-78-6
  • MF: C15H10O5
  • MW: 270.24
  • Catalog: NO Synthase
  • Density: 1.579g/cm3
  • Boiling Point: 508.9ºC at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 198ºC

9-Hydroxy-alpha-lapachone

9-Hydroxy-α-lapachone (α-Dihydrocaryopterone) is a natural phenol, exhibits potent inhibitory effects with an IC50 of 4.64 µM on LPS-induced NO production in RAW 264.7 cells[1].

  • CAS Number: 22333-58-0
  • MF: C15H14O4
  • MW: 258.27
  • Catalog: NO Synthase
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 436.4±45.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 166.4±22.2 °C

Anhydro notoptol

Anhydronotoptol is a potent nitric oxide inhibitory coumarin. Anhydronotoptol inhibits NO production in RAW 264.7 cells induced by LPS with an IC50 value of 36.6 μM[1].

  • CAS Number: 88206-51-3
  • MF: C21H20O4
  • MW: 336.38
  • Catalog: NO Synthase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A