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].
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].
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 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].
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].
Deoxyarbutin is a new effective lighten ingredient, can effectively inhibit tyrosinase activity and melanin synthesis to get significant and lasting lightening effect.
cis-Mulberroside A (Mulberroside D) is the cis-isomer of Mulberroside A. Mulberroside A is one of the main bioactive constituent in mulberry (Morus alba L.)[1]. Mulberroside A decreases the expressions of TNF-α, IL-1β, and IL-6 and inhibits the activation of NALP3, caspase-1, and NF-κB and the phosphorylation of ERK, JNK, and p38, exhibiting anti-inflammatory antiapoptotic effects[2]. Mulberroside A shows inhibitory activity against mushroom tyrosinase with an IC50 of 53.6 μM[3].
Benzylacetone is an aromatic compound from agarwood[1]. Benzylacetone exhibits potent and reversible antityrosinase (mushroom) activity， with IC50s of 2.8 mM and 0.6 mM for monophenolase and diphenolase, respectively[2]. Benzylacetone has appetite-enhancing and locomotor-reducing effects[3].
Compound 4B proved to be the most effective tyrosinase inhibitor (ic50= 3.80 μ M) It also showed good antioxidant activity.
Leptosin D, a thiodiketopiperazine alkaloid, is a mushroom tyrosinase inhibitor, with an IC50 of 28.4 μM[1].
2-Ketoglutaric acid-d4 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].
Pedalitin is a inhibitor of tyrosinase（IC50=0.28 mM） and α-glucosidase（IC50=0.29 mM）[1].
Glabrene, an isoflavene derived from licorice root, shows estrogen-like activity. Glabrene is a tyrosinase inhibitor with an IC50 of 3.5 μM[1][2].
2-Hydroxy-4-methoxybenzaldehyde, a chemical compound and an isomer of Vanillin, could be used to synthesis Urolithin M7[1]. 2-hydroxy-4-methoxybenzaldehyde is a potent tyrosinase inhibitor from three East African medicinal plants, Mondia whitei, Rhus vulgaris Meikle, and Sclerocarya caffra Sond[2].
4-Butylresorcinol is a phenol derivative which can inhibit tyrosinase with IC50 of 11.27 μM.
2,3-Dihydroisoginkgetin, a biflavonoid, is a inhibitor of Tyrosinase, with 36.84% inhibition at 0.1 mM. 2,3-Dihydroisoginkgetin shows less toxicity in HEMn (human epidermal melanocytes) cells, with an IC50 of 86.16 μM[1].
Flanvotumab (IMC-20D7S) is a human monoclonal antibody targeting to tyrosinase-related protein (TYRP1), specifically expressed in melanocytes and melanoma cells. Flanvotumab acts function via natural killing-mediated antibody-dependent cell-mediated cytotoxicity (ADCC). Flanvotumab has potent anti-tumor activity and good tolerance[1].
Tyrosinase-IN-11 is a potent tyrosinase inhibitor with IC50s of 50 nM and 64 nM for L-tyrosinase and L-dopa, respectively. Tyrosinase-IN-11 has significant antioxidant activity and low cytotoxicity. Tyrosinase-IN-11 has the potential for skin hyperpigmentation research[1].
Chetoseminudin B possesses mushroom tyrosinase inhibitory activity with IC50 of 31.7 μM[1].
Isoastilbin is a dihydroflavonol glycoside compound in Rhizoma Smilacis glabrae and Astragalus membranaceus. Isoastilbin inhibits glucosyltransferase (GTase) with an IC50 value of 54.3 μg/mL, and also inhibits tyrosinase activity. Isoastilbin shows neuroprotective, antioxidation, antimicrobial and anti-apoptotic properties and has the potential for Alzheimer’s disease research[1][21][3].
Benzoyloxypaeoniflorin, isolated from the root of Paeonia suffruticosa, is a tyrosinase inhibitor against mushroom tyrosinase with IC50 of 0.453 mM. Benzoyloxypaeoniflorin is NF-κB Inhibitor and contributes to improving blood circulation through its inhibitory effect on both platelet aggregation and blood coagulation[1][2][3].
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]
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].
7-Methoxy obtusifolin (Compound 4) is a competitive tyrosinase inhibitor with an IC50 of 7.0 μM[1].
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
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].
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].
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].