4-hydrazino-7-nitro-benzofurazan hydrazine adduct

4-Hydrazino-7-nitrobenzofurazan hydrazine adduct serves as a fluorescent reagent for protein labeling.

6-Ethyl-7-hydroxy-4-methylchromen-2-one is a fluorescent dye.

7-BFC (7-Benzyloxy-4-(trifluoromethyl)coumarin) is a coumarin-like fluorescent substrate that serves as a biomarker for cytochrome P 450 and can be used to study CYP isoforms and cytochrome P 450 metabolism.

NBD-F (4-Fluoro-7-nitrobenzofurazan) is a fluorescent derivatization agent used for amino acid analysis.

Compound 2f, chemically known as 4-Methyl-7-(2-nitrophenoxy)-2H-chromen-2-one, is a selenium alcohol fluorescent probe designed on the nucleophilic aromatic substitution mechanism. It exhibits selective recognition of selenols in neutral aqueous solutions without significant interference from biological thiols, amines, or alcohols. This compound is utilized for quantifying selenium content in selenoproteins and imaging the activity of endogenous selenols in living cells.

7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one (Compound 1) serves as a fluorescent probe for detecting hydrogen sulfide (H2S). It is characterized by a low detection limit (4×10^-6 mol L), high selectivity, and great sensitivity. At a concentration of 150 µg mL, it exhibits negligible cytotoxicity. The excitation wavelength is 331 nm, while in DMSO solvent, it emits at approximately 385 nm; upon addition of HS-, the fluorescence intensity significantly increases around 392 nm.

4-Methyl-7-(4-nitrophenoxy)-2H-chromen-2-one is a fluorescent coumarin derivative with excitation and emission wavelengths of 323 nm and 445 nm, respectively.

8-(4-ethynylphenyl)-1,3,5,7-tetramethyl BODIPY is an organic fluorescent dye characterized by an ethynylphenyl group at the 8-position of the boron dipyrromethene (BODIPY) structure and methyl substituents at the 1, 3, 5, and 7 positions. It boasts a high fluorescence quantum yield and specific chemical properties, making it useful for applications such as fluorescence imaging.

8-(4-bromophenyl)-1,3,5,7-tetramethyl-BODIPY is a derivative based on the BODIPY structure, featuring four methyl groups at positions 1, 3, 5, and 7, with a para-bromophenyl group attached at position 8. This compound finds extensive use in fields such as bioimaging, chemical analysis, and materials science, serving as a fluorescent probe for imaging biological samples, detecting specific chemicals, or in the development of optical materials.

Ac-DNLD-AMC is a fluorogenic caspase-3 substrate. Upon enzymatic cleavage by caspase-3, 7-amino-4-methylcoumarin (AMC) is released and its fluorescence can be used to quantify caspase-3 activity. AMC displays excitation emission maxima of 340-360 and 440-460 nm, respectively.

STY-BODIPY is a styrene-conjugated fluorogenic probe for radical-trapping antioxidant (RTA) activity.1 Co-autoxidation of the STY-BODIPY signal carrier and a hydrocarbon co-substrate can be quantified by monitoring the loss of absorbance at 571 nm. STY-BODIPY has been used to measure the activity of RTAs, as well as the kinetics and stoichiometry of RTA reactions in cell-free assays.1,2,3References1. Haidasz, E.A., Van Kessel, A.T.M., and Pratt, D.A. A continuous visible light spectrophotometric approach to accurately determine the reactivity of radical-trapping antioxidants. J. Org. Chem. 81(3), 737-744 (2016).2. Shah, R., Shchepinov, M.S., and Pratt, D.A. Resolving the role of lipoxygenases in the initiation and execution of ferroptosis. ACS Cent. Sci. 4(3), 387-396 (2018).3. Chauvin, J.-P.R., Haidasz, E.A., Griesser, M., et al. Polysulfide-1-oxides react with peroxyl radicals as quickly as hindered phenolic antioxidants and do so by a surprising concerted homolytic substitution. Chem. Sci. 7(10), 6347-6356 (2016). STY-BODIPY is a styrene-conjugated fluorogenic probe for radical-trapping antioxidant (RTA) activity.1 Co-autoxidation of the STY-BODIPY signal carrier and a hydrocarbon co-substrate can be quantified by monitoring the loss of absorbance at 571 nm. STY-BODIPY has been used to measure the activity of RTAs, as well as the kinetics and stoichiometry of RTA reactions in cell-free assays.1,2,3 References1. Haidasz, E.A., Van Kessel, A.T.M., and Pratt, D.A. A continuous visible light spectrophotometric approach to accurately determine the reactivity of radical-trapping antioxidants. J. Org. Chem. 81(3), 737-744 (2016).2. Shah, R., Shchepinov, M.S., and Pratt, D.A. Resolving the role of lipoxygenases in the initiation and execution of ferroptosis. ACS Cent. Sci. 4(3), 387-396 (2018).3. Chauvin, J.-P.R., Haidasz, E.A., Griesser, M., et al. Polysulfide-1-oxides react with peroxyl radicals as quickly as hindered phenolic antioxidants and do so by a surprising concerted homolytic substitution. Chem. Sci. 7(10), 6347-6356 (2016).

7-Azido-4-methylcoumarin (7-azido-4-methyl-2H-chromen-2-one) is a fluorescent photoactive probe used in the study of human phenol sulfotransferase (SULT1A1 or P-PST-1) substrate binding sites through photoaffinity labeling.

7-Fluoro-2,1,3-benzoxadiazole-4-sulfonate (SBD-F) is a thiol-reactive fluorogenic probe.1It has been used to quantify the levels of homocysteine, cysteine, and cysteamine in human plasma.2SBD-F displays excitation emission maxima of 380 515 nm, respectively.1 1.Imai, K., Toyo'oka, T., and Watanabe, Y.A novel fluorogenic reagent for thiols: Ammonium 7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonateAnal. Biochem.128(2)471-473(1983) 2.Ichinose, S., Nakamura, M., Maeda, M., et al.A validated HPLC-fluorescence method with a semi-micro column for routine determination of homocysteine, cysteine and cysteamine, and the relation between the thiol derivatives in normal human plasmaBiomed. Chromatogr.23(9)935-939(2009)

Mca-PLAC(p-OMeBz)-WAR(Dpa)-NH2 is a fluorogenic substrate for matrix metalloproteinase-14 (MMP-14). Upon cleavage by MMP-14, 7-methoxycoumarin-4-acetyl (Mca) is released and its fluorescence can be used to quantify MMP activity. Mca displays excitation emission maxima of 328 420 nm, respectively.

Z-(L-Arg)-AMC is a fluorogenic substrate for trypsin, cathepsin B, and cathepsin H.1,2Upon enzymatic cleavage by trypsin, cathepsin B, or cathepsin H, 7-amino-4-methylcoumarin (AMC) is released and its fluorescence can be used to quantify trypsin, cathepsin B, and cathepsin H activity. AMC displays excitation emission maxima of 340-360 440-460 nm, respectively. 1.Zimmerman, M., Ashe, B., Yurewicz, E.C., et al.Sensitive assays for trypsin, elastase, and chymotrypsin using new fluorogenic substratesAnal. Biochem.78(1)47-51(1977) 2.Brindley, P.J., Kalinna, B.H., Dalton, J.P., et al.Proteolytic degradation of host hemoglobin by schistosomesMol. Biochem. Parasitol.89(1)1-9(1997)

L-Leu-AMC is a fluorogenic substrate for leucine aminopeptidase.1Upon enzymatic cleavage by leucine aminopeptidase, AMC is released and its fluorescence can be used to quantify leucine aminopeptidase activity. AMC displays excitation emission maxima of 340-360 440-460 nm, respectively. 1.Izquierdo, M., Lin, D., O'Neill, S., et al.Development of a high-throughput screening assay to identify inhibitors of the major M17-leucyl aminopeptidase from Trypanosoma cruzi using rapidfire mass spectrometrySLAS Discov.25(9)1064-1071(2020)

Ac-ANW-AMC is a fluorogenic substrate for the β5i LMP7 subunit of the 20S immunoproteasome. [1] Upon cleavage, 7-amino-4-methylcoumarin (AMC) is released, and its fluorescence quantifies the activity of the β5i LMP7 subunit. AMC displays excitation emission maxima of 340-360 440-460 nm, respectively.

7-Ethoxy-4-(trifluoromethyl)coumarin is a substrate for Cytochrome P450 enzyme and is involved in metabolism in the body, and is capable of generating fluorescent signals with an excitation wavelength of 410 nm and an emission wavelength of 510 nm.

7-Dimethylaminocoumarin-4-acetic acid, catalog number T64950, CAS number 80883-54-1, is a valuable organic compound for life sciences research.

2-(7-Methoxy-2-oxo-2H-chromen-4-yl)acetic acid is a useful organic compound for research related to life sciences. The catalog number is T64951 and the CAS number is 62935-72-2.

2-(7-Hydroxy-2-oxo-2H-chromen-4-yl)acetic acid is a useful organic compound for research related to life sciences. The catalog number is T65277 and the CAS number is 6950-82-9.

7-(Diethylamino)-4-methyl-2H-chromen-2-one is a useful organic compound for research related to life sciences. The catalog number is T66262 and the CAS number is 91-44-1.

7-Hydroxy-4-methylcoumarin-3-acetic acid, SE is a useful organic compound for research related to life sciences. The catalog number is T67683 and the CAS number is 96735-88-5.

Acid orange 7 (COLIPA C015) is a dye used to dye wool.