Tropolone, a tropone derivative with a hydroxyl group in the 2-position, is a precursor of manyazulene derivatives such as methyl 2-methylazulene-1-carboxylate[1]. Tropolone is a potent inhibitor of mushroom tyrosinase with a IC50 of 0.4 μM, and the inhibition can be reversed by dialysis or by excess CU2+[2].
4-Chlorocinnamic acid has inhibitory effects on tyrosinase. 4-Chlorocinnamic acid has antibacterial activity. 4-Chlorocinnamic acid also inhibits Colletotrichum gloeosporioides growth[1][2][3].
Viscumneoside III, a dihydroflavone O-glycoside, is a potent tyrosinase inhibitor with an IC50 of 0.5 mM. Viscumneoside III has anti-angina pectoris[1].
5-Feruloylquinic acid (5-FQA) possesses antioxidative effects and tyrosinase inhibitory activities[1].
Tyrosinase (Polyphenol oxidase) is a rate-limiting enzyme that controls the production of melanin and is encoded by TYR gene. Tyrosinase is mainly found in melanosomes synthesized by skin melanocytes[1].
(±)-Taxifolin ((±)-Dihydroquercetin) is the racemate of Taxifolin. Taxifolin exhibits important anti-tyrosinase activity. Taxifolin exhibits significant inhibitory activity against collagenase with an IC50 value of 193.3 μM[1].
Tyrosinase-IN-17 (Compound 5b) is a lipophilic, skin-permeable, and non-cytotoxic Tyrosinase inhibitor (pIC50=4.99). Tyrosinase-IN-17 can be used for research on melanin-related diseases, such as melanoma, melanogenesis, etc[1].
Kojic acid dipalmitate (Kojic dipalmitate) is a derivative of Kojic acid (HY-W050154), a fungal metabolite that can be produced by species of Aspergillus, Acetobacter and Penicillium. Kojic acid dipalmitate is a slow and reversible competitive inhibitor of tyrosinase. Kojic acid dipalmitate can be used for skin‐lightening agent research[1].
Trifolirhizin is a pterocarpan flavonoid isolated from the roots of Sophora flavescens. Trifolirhizin possesses potent tyrosinase inhibitory activity with an IC50 of 506 μM[1]. Trifolirhizin exhibits potential anti-inflammatory and anticancer activities[2].
Cyclocommunol is a prenylflavonoid with antityrosinase and antiplatelet activitie, can be solated from breadfruit. Cyclocommunol exerts anti-tumor activity and inhibits the growth of human hepatoma and gastric cancer cells with IC50 values between 16 and 80 µM. Cyclocommunol shows proapoptotic effect on oral squamous cell carcinoma (OSCC)[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].
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].
Azo-resveratrol, an Azo compound, inhibits Mushroom tyrosinase (IC50=36.28 μM).
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].
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].
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].
Isolindleyin, a butyrophenone, is a tyrosinase inhibitor, with a Kd of 54.8 μM for human tyrosinase. Isolindleyin exhibits anti-inflammatory, analgesic and anti-melanogenic activities[1].
A selective small molecule toward Tec kinase-mediated tyrosine phosphorylation of FGF2 with IC50 of 11.7 uM; inhibits Tec-FGF2 complex and blocks tyrosine phosphorylation of FGF2 in cells, also inhibit FGF2 secretion from cells.
(rel)-β-Tocopherol is a relative configuration of β-Tocopherol.(±)-β-Tocopherol is a lipid-soluble form of vitamin E with antioxidant activity. 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].
Lavendustin B is an inhibitor of HIV-1 integrase interaction with LEDGF/p75 with an IC50 of 94.07 μM. Lavendustin B is an ATP-competitive GLUT1 inhibitor with a Ki of 15 µM. Lavendustin B is also a weak inhibitor of tyrosine kinases[1][2].
Hexylresorcinol is an organic compound with local anaesthetic, antiseptic and anthelmintic properties, is a potent inhibitor of mushroom tyrosinase, causing 90% loss of activity at 100 μM.
Tyrosinase-IN-16 (compound 19a) is a tyrosine kinase (Tyrosinase) inhibitor with Ki=470 nM. Tyrosinase-IN-16 is cytotoxic to B16F10 cells, with >90% inhibition at 20 μM[1].
Ac-[Nle4,D-Phe7]-α-MSH (4-10)-NH2 is a melanotropin, a melanocyte-stimulating hormone. Ac-[Nle4,D-Phe7]-α-MSH (4-10)-NH2 stimulates tyrosinase and exhibits thermoregulatory effect in rats model[1][2].
Swertiajaponin is a tyrosinase inhibitor, forms multiple hydrogen bonds and hydrophobic interactions with the binding pocket of tyrosinase, with an IC50 of 43.47 μM. Swertiajaponin also inhibits oxidative stress-mediated MAPK/MITF signaling, leading to decrease in tyrosinase protein level. Swertiajaponin suppresses melanin accumulation and exhibits strong anti-oxidative activity[1].
2-Ketoglutaric acid calcium (Alpha-Ketoglutaric acid calcium) is an intermediate in the production of ATP or GTP in the Krebs cycle. 2-Ketoglutaric acid calcium also acts as the major carbon skeleton for nitrogen-assimilatory reactions. 2-Ketoglutaric acid calcium is a reversible inhibitor of tyrosinase (IC50=15 mM)[1][2].
Taxifolin exhibits important anti-tyrosinase activity. Taxifolin exhibits significant inhibitory activity against collagenase with an IC50 value of 193.3 μM.
Tyrosinase-IN-10 (Compound 23) is a partially competitive tyrosinase inhibitor with an IC50 of 1.6 μM against tyrosinase activity from human melanoma cell lysates[1].