scavenging

Dimboa (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) is an antifungal compound used in crops.

5-Hydroxyoxindole has been identified as a urinary metabolite of indole, which is produced from tryptophane via the tryptophanase activity of gut bacteria [1]. 5-Hydroxyoxindole has lipid peroxidation inhibition activity and free radical DPPH scavenging

1. Thonningianin A has anti-cancer activities.2. Thonningianin A represents a new potent glutathione S-transferase in vitro inhibitor.3. Thonningianin A has antioxidant property, involves radical scavenging, anti-superoxide formation and metal chelation.

OsMundacetone (4-(3,4-Dihydroxyphenyl)-3-buten-2-one) is a natual product isolated from Rhizoma osmundae.

1. Loganic acid (Loganate) and geniposide exhibit both sides effect on superoxide generation.

Norbergenin is a chemical compound. It is the O-demethylated derivative of bergenin. It can be isolated from rhizomes of Bergenia stracheyi.

3-demethylcolchicine is a natural product isolated from Gloriosa superba.Inhibitory effect on the polymerization of purified bovine brain tubulin.

Aucuparin (2,6-dimethoxy-4-phenylphenol) is a plant antibiotic with anti-inflammatory activity. Aucuparin inhibited pulmonary fibrosis in mouse models induced by bleomycin (BLM). ABTS and FRAP showed clear scavenging activity. Aucuparin inhibited superoxide production of human neutrophils induced by fmlp, and its IC50 was 17.0μM.

Protocatechuic acid (3, 4-Dihydroxybenzoic acid) (3, 4-dihydroxybenzoic acid) is a natural phenolic compound found in many edible and medicinal plants. Recent studies indicate that it could be used as a protective agent against cardiovascular diseases and neoplasms. The mechanism of its action is mostly associated with antioxidant activity, including inhibition of generation as well as scavenging of free radicals and up-regulating enzymes which participate in their neutralization.

Gallic acid (Benzoic acid) is found in almost all plants. Plants known for their high gallic acid content include gallnuts,grapes,tea,hops and oak bark.

Azelaic acid (Anchoic acid) is a component of hair and skin conditioners and is produced by the ozonolysis of oleic acid. Azelaic acid has bacteriostatic activity against Propionibacterium acnes and Staphylococcus epidermidis by inhibiting protoprotein synthesis in microbial cells. Azelaic acid also has the ability to inhibit pigmentation due to its free radical scavenging action.

Phloretin (NSC-407292) is a well-known inhibitor of eukaryotic urea transporters, blocks VacA-mediated urea and ion transport. Phloretin is a dihydrochalcone, a type of natural phenols. It can be found in apple tree leaves and the Manchurian apricot. It promotes potent antioxidative activities in peroxynitrite scavenging and the inhibition of lipid peroxidation. It has been found to inhibit the growth of several cancer cells and induce apoptosis of B16 melanoma and HL60 human leukemia cells.

N,N'-Dimethylthiourea (DMTU) (DMTU), isolated from Allii Sativi Bulbus, is an orally active scavenger of hydroxyl radical ( OH) and blocks OH production by activated neutrophils in vitro. N,N'-Dimethylthiourea protects against water-immersion restraint stress (WIRS)-induced gastric mucosal lesions in rats by exerting its antioxidant action including OH scavenging and anti-inflammatory action [1][2] .

Gallic Acid Monohydrate (3,4,5-Trihydroxybenzoic acid Monohydrate) is a hydrate of Gallic Acid, a natural polyhydroxyphenol, which inhibits the free radical scavenging effect of COX-2, and possesses a variety of physiological activities such as antioxidant, anti-inflammatory, anti-tumor, and antibacterial.

Nordihydroguaiaretic acid (NDGA) is a natural product, extracted from Pole Fork Kelaroa, and is a lipoxygenase (5-LOX) inhibitor (IC50=8 μM). Nordihydroguaiaretic acid possesses antioxidant and free radical scavenging properties.

Homovanillyl alcohol, a biological metabolite of Hydroxytyrosol, is a phenolic compound found in virgin olive oil (VOO) and wine. It exhibits high scavenging activities, protects red blood cells from hemolysis in a dose-dependent manner, and has a protective effect on cardiovascular disease and total mortality.

D-Isofloridoside, a polysaccharide precursor, exhibits free radical scavenging activity and inhibits both ROS expression and the enzymes MMP-2 and MMP-9.

Tropolone, a metal chelator, possesses weak antioxidative and radical-scavenging properties and shows a strong affinity for ferric ion

Diplacone (DP) is a geranylated flavonoid compound that is naturally found in the fruit of Paulownia tomentosa. Diplacone possesses anti-inflammatory and free radical-scavenging (anti-radical) activity. Diplacone has been investigated for its potential anticancer activity, particularly in studies involving A549 human lung cancer cells, where it demonstrated inhibitory effects on cancer cell growth and survival.

5,6,7-Trihydroxy-4'-methoxyflavone is an antioxidant natural product exhibiting an IC₅₀ of 25.29 μM in DPPH radical scavenging activity assays on PC12 cells.

Caulophylline B, an alkaloid extracted from the roots of Caulophyllum robustum Maxim, affords a low scavenging effect against DPPH radical.

γ-Glutamyl-S-1-propenyl cysteine is a compound obtained from garlic with strong free radical scavenging activity.

Echinacoside is a natural polyphenolic compound with various kinds of pharmacological activities, such as anti-inflammatory, antioxidative, hepatoprotective, neuroprotective, nitric oxide radical-scavenging and vasodilative ones.

Loganin (Loganoside), an iridoid glucoside, has been reported to be an inhibitor of Cox-1 and also noted to suppress TNF-α formation. This compound also has displayed potent free-radical-scavenging activity and inhibitory effects on melanogenesis.