Oxyresveratrol is neuroprotective and inhibits the apoptotic cell death in transient cerebral ischemia. It effectively scavenges H2O2, NO (IC50 = 45.3 μM), and the artificial free radical 2,2-diphenyl-l-picrylhydrazyl (IC50 = 28.9 μM) In vitro: 1)oxyresveratrol exhibited more than 50% inhibition at 100 μM on L-tyrosine oxidation by murine tyrosinase activity.2) oxyresveratrol showed an IC50 value of 52.7 μM on the enzyme activity. 3) oxyresveratrol works through reversible inhibition of tyrosinase activity rather than suppression of the expression and synthesis of the enzyme.[2] In vivo: 1) Oxyresveratrol (10 or 20 mg/kg) significantly reduced the brain infarct volume by approximately 54% and 63%, respectively, when compared to vehicle-treated MCAO rats.2) oxyresveratrol treatment diminished cytochrome c release and decreasedcaspase-3 activation in MCAO rats. [3]
2-Ketoglutaric acid-d6 is the deuterium labeled 2-Ketoglutaric acid[1]. 2-Ketoglutaric acid (Alpha-Ketoglutaric acid) is an intermediate in the production of ATP or GTP in the Krebs cycle. 2-Ketoglutaric acid also acts as the major carbon skeleton for nitrogen-assimilatory reactions. 2-Ketoglutaric acid is a reversible inhibitor of tyrosinase (IC50=15 mM)[2].
D-Tyrosine-d4 is the deuterium labeled D-Tyrosine. D-Tyrosine is the D-isomer of tyrosine. D-Tyrosine negatively regulates melanin synthesis by inhibiting tyrosinase activity. D-Tyrosine inhibits biofilm formation and trigger the self-dispersal of biofilms without suppressing bacterial growth[1][2].
Oxyresveratrol 3'-O-β-D-glucopyranoside is a phenolic compound isolated from Morus nigra root and is an effective tyrosinase inhibitor with an IC50 of 1.64 μM[1].
Kurarinol is a flavanone found in the root of Sophora flavescens. Kurarinol is a competitive tyrosinase inhibitor, with IC50 of 0.1 μM for mushroom tyrosinase[1].
TNK2-IN-1 is a TNK2 inhibitor. TNK2-IN-1 has an IC50 of 224 nM for TNK2. TNK2-IN-1 can be used for the research of cancer[1].
4-Prenyloxyresveratrol, an oxyresveratrol derivative, shows potent tyrosinase inhibitory activity with an IC50 of 0.90 μM[1].
5-epi-Arvestonate A is a sesquiterpenoid isolated from the whole plants of Seriphidium transiliense. 5-epi-Arvestonate A promotes melanogenic production by activating the transcription of microphthalmia-associated transcription factor (MITF) and tyrosinase family genes. 5-epi-Arvestonate A inhibits the expression of IFN-γ-chemokine through the JAK/STAT signaling pathway in immortalized human keratinocyte (HaCaT) cells[1].
Dodoviscin A is a pigmentation-altering agent, which can be isolated from the aerial parts of Dodonaea viscosa. Dodoviscin A inhibits melanin production in B16-F10 melanoma cells. Dodoviscin A suppresses mushroom tyrosinase activity, and tyrosinase activity induced by 3-isobutyl-1-methylxanthine. Dodoviscin A also inhibits the phorphosylation of cAMP response element binding protein, induced by 3-isobutyl-1-methylxanthine and forskolin[1].
7-Methoxy obtusifolin (Compound 4) is a competitive tyrosinase inhibitor with an IC50 of 7.0 μM[1].
Azo-resveratrol, an Azo compound, inhibits Mushroom tyrosinase (IC50=36.28 μM).
3-O-Ethyl-L-ascorbic acid, a stable vitamin C derivative, is a cosmetic tyrosinase tnhibitor with a whitening capacity. 3-O-Ethyl-L-ascorbic acid also has antioxidant abilities[1][2].
Arbutin(β-Arbutin) is a glycoside; a glycosylated hydroquinone extracted from the bearberry plant in the genus Arctostaphylos; inhibits tyrosinase and thus prevents the formation of melanin.IC50 value:Target: tyrosinase
3',4'-Dihydroxyacetophenone (3,4-DHAP), isolated from Picea Schrenkiana Needles exhibits a strong suppressive action against tyrosinase activity, with an IC50 of 10 μM. 3',4'-Dihydroxyacetophenone (3,4-DHAP) is a vasoactive agent and antioxidant[1][2].
β-Sitostenone is a sterols that can be isolated from Cochlospermum vitifolium.β-Sitostenone inhibits tyrosinase activity, and has anti-melanogenic and anti-tumor activities[1][2][3].
Polyphyllin C (compound 2) is a spirostanol saponin. Polyphyllin C exhibits mild (IC50=36.87 µM) activities against the tyrosinase and moderate (IC50=1.59 µg/mL) antileishmanial activities[1][2].
ent-11α-Hydroxy-15-oxokaur-16-en-19-oic acid is an anti-melanin synthesis tyrosinase inhibitor, which can be isolated from Pteris fern. ent-11α-Hydroxy-15-oxokaur-16-en-19-oic acid regulates the melanogenesis transcription factor microphthalmia-associated transcription factor (MITF). The 11α-OH, 15-oxo and 16-en moieties of ent-11α-Hydroxy-15-oxokaur-16-en-19-oic acid are key fragments that inhibit melanin synthesis. The 19-COOH moiety has been implicated in the inhibition of cytotoxicity associated with 11α-OH KA and related compounds[1].
D-Tyrosine-d7 is the deuterium labeled D-Tyrosine. D-Tyrosine is the D-isomer of tyrosine. D-Tyrosine negatively regulates melanin synthesis by inhibiting tyrosinase activity. D-Tyrosine inhibits biofilm formation and trigger the self-dispersal of biofilms without suppressing bacterial growth[1][2].
Oxyresveratrol 2-O-β-D-glucopyranoside is a phenolic compound isolated from Morus nigra root and is an effective tyrosinase inhibitor with an IC50 of 29.75 μM[1].
(R)-Trolox is a water soluble vitamin E analogue and a competitive tyrosinase inhibitor with a Ki value of 0.83 mM and a ID50 value of 1.88 mM[1]. The (R)-Trolox has stronger tyrosinase affinity than the (S) enantiomer (Ki value of 0.61 mM)[1].
Phaeosphaone D is a thiodiketopiperazine alkaloid compound isolated from Phaeosphaeria fuckelii, an endophytic fungus. Phaeosphaone D displays mushroom tyrosinase inhibitory activity with an IC50 value of 33.2 μM[1].
Methyl rosmarinate is a noncompetitive tyrosinase inhibitor which is isolated from Rabdosia serra, with an IC50 of 0.28 mM for mushroom tyrosinase, and also inhibits a-glucosidase[1].
Tetrapeptide-30 is a skin-brightening peptide consisting of four amino acids. Tetrapeptide-30 can act as a tyrosinase inhibitor, lightening hyperpigmentation and evening out skin tone by reducing the amount of tyrosinase and inhibiting melanocyte activation[1].
Chlorogenic acid butyl ester, a caffeoylquinic acid, is a potent melanogenesis inhibitor. Chlorogenic acid butyl ester inhibits the expression of microphtalmia-associated transcription factor (MITF), tyrosinase, tyrosinerelated protein 1 (TRP-1), and TRP-2. Chlorogenic acid butyl ester also shows antioxidant activity[1].
β-Tocopherol-d3 is the deuterium labeled β-Tocopherol. β-Tocopherol is an analogue of vitamin E, exhibits antioxidant properties. β-Tocopherol can inhibit tyrosinase activity and melanin synthesis. β-Tocopherol also can prevent the inhibition of cell growth and of PKC activity caused by d-alpha-tocopherol[1][2][3].
Allamandicin is an iridoid lactones. Allamandicin can be isolated from the roots of Allamanda cathartica. Allamandicin is an inhibitor of tyrosinase[1].
Methyl cinnamate (Methyl 3-phenylpropenoate), an active component of Zanthoxylum armatum, is a widely used natural flavor compound. Methyl cinnamate (Methyl 3-phenylpropenoate) possesses antimicrobial activity and is a tyrosinase inhibitor that can prevent food browning. Methyl cinnamate (Methyl 3-phenylpropenoate) has antiadipogenic activity through mechanisms mediated, in part, by the CaMKK2-AMPK signaling pathway[1].
β-Tocopherol is an analogue of vitamin E, exhibits antioxidant properties. β-Tocopherol can inhibit tyrosinase activity and melanin synthesis. β-Tocopherol also can prevent the inhibition of cell growth and of PKC activity caused by d-alpha-tocopherol[1][2][3].
Paltimatrectinib (compound I-147) is a potent tyrosine kinase inhibitor with an IC50 of <10 nM for tropomyosin kinases A (TrkA). Paltimatrectinib has the potential for cancer and inflammatory diseases[1].
XMD16-5 is a potent TNK2 inhibitor with IC50 values of 16 and 77 nM for the D163E and R806Q mutations, respectively.