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Octinoxate (Octyl 4-methoxycinnamate) is used is in sunscreens and other cosmetics to absorb UV-B rays from the sun, protecting the skin from damage,primarily as an ingredient in some sunscreens and lip balms. It is also used to reduce the appearance of scars.

Dioxybenzone (Benzophenone-8) is an organic agent that blocks UVB and short-wave UVA ultraviolet radiation.

4-aminobenzoic acid is an organic acid with UV-absorbing and antifibrotic properties. When exposed to light, 4-aminobenzoic acid absorbs UV light and releases excess energy through a photochemical reaction, which may cause DNA damage.4-aminobenzoic acid also increases oxygen uptake at the tissue level and may enhance monoamine oxidase (MAO) activity to promote serotonin degradation, which in excess may lead to fibrotic Changes.

UV-1164 is an aromatic ether commonly used as an ultraviolet absorber, which can be used can be used in organic synthesis and biochemical experiments.

4-Methylbenzylidene camphor is an ultraviolet light blocker used in cosmetics and sunscreen preparations ,specifically UV B radiation, also has estrogenic activities.

1. Ethyl trans-caffeate (Caffeic Acid Ethyl Ester) has anti-inflammatory activity. 2. Ethyl trans-caffeate may as a promising natural compound for future application in chronic liver disease. 3. Ethyl trans-caffeate is a potent chemopreventive compound against skin carcinogenesis caused by solar UV exposure. 4. Ethyl trans-caffeate is the high-resolution structures of representative inhibitors in complex with human pancreatic α-amylase. 5. Ethyl trans-caffeate strongly inhibits neoplastic transformation of JB6 Cl41 cells without toxicity. PI3K, ERK1 2, and p38 kinase activities were suppressed by direct binding with HOEC in vitro.

SP187 (MON-DNJ) is a host-targeted iminosugar. It has anti-filovirus infection activity.SP187 is used for therapeutic use against influenza and dengue viruses.

Photoswitchable PAD inhibitor is a photoactivated protein arginine deiminase (PAD) inhibitor and a derivative of BB-Cl-amidine that contains an azobenzene photoswitch allowing optical control of PAD activity.1 Without photoactivation, it is a weak inhibitor of PAD2 (IC50 = >100 μM) and is less potent than BB-Cl-amidine in inhibiting citrulline production in vitro (kinact/KIs = 2,300, 600, 1,000, and 10,510 M-1min-1 for PAD1-4, respectively) and does not inhibit histone H3 citrullination in HEK293T cells overexpressing PAD2 when used at concentrations up to 100 μM. However, it can rapidly be photoactivated with UV-A radiation to the more active cis-isomer, which is an irreversible, competitive inhibitor of histone H3 citrullination with an IC50 value of 9.1 μM.References1. Mondal, S., Parelkar, S.S., Nagar, M., et al. Photochemical control of protein arginine deiminase (PAD) activity. ACS Chem. Biol. 13(4), 1057-1065 (2018). Photoswitchable PAD inhibitor is a photoactivated protein arginine deiminase (PAD) inhibitor and a derivative of BB-Cl-amidine that contains an azobenzene photoswitch allowing optical control of PAD activity.1 Without photoactivation, it is a weak inhibitor of PAD2 (IC50 = >100 μM) and is less potent than BB-Cl-amidine in inhibiting citrulline production in vitro (kinact/KIs = 2,300, 600, 1,000, and 10,510 M-1min-1 for PAD1-4, respectively) and does not inhibit histone H3 citrullination in HEK293T cells overexpressing PAD2 when used at concentrations up to 100 μM. However, it can rapidly be photoactivated with UV-A radiation to the more active cis-isomer, which is an irreversible, competitive inhibitor of histone H3 citrullination with an IC50 value of 9.1 μM. References1. Mondal, S., Parelkar, S.S., Nagar, M., et al. Photochemical control of protein arginine deiminase (PAD) activity. ACS Chem. Biol. 13(4), 1057-1065 (2018).

para-amino-Blebbistatin is a more water-soluble form of (S)-4'-nitro-blebbistatin , which is a more stable and less phototoxic form of (-)-blebbistatin .1,2,3 (-)-Blebbistatin is a selective cell-permeable inhibitor of non-muscle myosin II ATPases that rapidly and reversibly inhibits Mg-ATPase activity and in vitro motility of non-muscle myosin IIA and IIB for several species (IC50s = 0.5-5 μM), while poorly inhibiting smooth muscle myosin (IC50 = 80 μM).2,3,4 Through these effects, it blocks apoptosis-related bleb formation, directed cell migration, and cytokinesis in vertebrate cells. However, prolonged exposure to blue light (450-490 nm) results in degradation of blebbistatin to an inactive product via cytotoxic intermediates, which may be problematic for its use in fluorescent live cell imaging applications.5,6 The addition of a 4'-amino group increases its water solubility, decreases the inherent fluorescence, stabilizes the molecule to circumvent its degradation by prolonged blue light exposure, and decreases its phototoxicity while retaining the in vitro and in vivo activity of blebbistatin.7 para-amino-Blebbistatin has the same stereochemistry as the active (-)-blebbistatin enantiomer. |1. Várkuti, B.H., Képiró, M., Horváth, I.á., et al. A highly soluble, non-phototoxic, non-fluorescent blebbistatin derivative. Sci. Rep. 6:26141, (2016).|2. Straight, A.F., Cheung, A., Limouze, J., et al. Dissecting temporal and spatial control of cytokinesis with a myosin II inhibitor. Science 299(5613), 1743-1747 (2003).|3. Kovács, M., Tóth, J., Hetényi, C., et al. Mechanism of blebbistatin inhibition of myosin II. J. Biol. Chem. 279(34), 35557-35563 (2004).|4. Limouze, J., Straight, A.F., Mitchison, T., et al. Specificity of blebbistatin, an inhibitor of myosin II. J. Muscle Res. Cell Motil. 25(4-5), 337-341 (2004).|5. Kolega, J. Phototoxicity and photoinactivation of blebbistatin in UV and visible light. Biochem. Biophys. Res. Commun. 320(3), 1020-1025 (2004).|6. Sakamoto, T., Limouze, J., Combs, C.A., et al. Blebbistatin, a myosin II inhibitor, is photoinactivated by blue light. Biochemistry 44(2), 584-588 (2005).|7. Verhasselt, S., Roman, B.I., Bracke, M.E., et al. Improved synthesis and comparative analysis of the tool properties of new and existing D-ring modified (S)-blebbistatin analogs. Eur. J. Med. Chem. 136, 85-103 (2017).

Urocanic acid (4-Imidazoleacrylic acid), synthesized in the epidermis, functions as a primary absorber of ultraviolet (UV) radiation in mammalian skin.

UR-MK299 is a NPY Y1 receptor antagonist.

2',6'-Dihydroxy-4'-methoxyacetophenone is a phytoalexin after fungal inoculation with Botrytis cinerea or UV light irradiation, it has spore germination inhibition on Botrytis cinerea and Phomopsis perniciosa, with ED50 values of 45 and 410 uM, respective

Sodium 4-aminobenzoate is a biochemical reagent. Based on its structure, sodium 4-aminobenzoate exhibits antioxidant, anticoagulant, fibrinolytic, and immunomodulatory activities, and it can be used for UV exposure protection and gastrointestinal condition diagnostic tests.

4-Amino-TEMPO is employed as a spin label to detect free radicals and the damage they cause. It mimics the activity of superoxide dismutase and can easily penetrate cells, thus safeguarding them against oxidative damage induced by H2O2. Moreover, 4-Amino-TEMPO demonstrates significant radioprotective properties, effectively shielding DNA from oxidative stress damage caused by UV irradiation by maintaining a positive charge. Additionally, 4-Amino-TEMPO serves as a highly selective oxidation catalyst and is extensively used in the development of various specialty chemicals, including fragrances and pesticides.