Coumarin 4, 4-MU, 4-Methylumbelliferone
Empirical Formula (Hill Notation):
C10H8O3 · H2O
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:




188.5-190 °C (lit.)


≤221 nm

SMILES string


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Standard for the fluorometric determination of enzyme activity.
Suitable as laser dye

Other Notes

This product has been replaced by M1381-ALDRICH | 4-Methylumbelliferone ≥98%


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dust mask type N95 (US),Eyeshields,Gloves

WGK Germany


Certificate of Analysis

Certificate of Origin

K Takagaki et al.
Journal of biochemical and biophysical methods, 19(2-3), 207-214 (1989-08-01)
The present paper describes a fluorometric assay for galactosaminoglycan-degrading endo-beta-xylosidase, utilizing glycosaminoglycan chains bearing a 4-methylumbelliferyl group at the reducing terminus as a substrate. This fluorogenic substrate is synthesized by human skin fibroblasts cultured in the presence of a fluorogenic...
Joanna Trykowska Konc et al.
European journal of medicinal chemistry, 46(6), 2252-2263 (2011-03-29)
A series of novel O-aminoalkyl substituted 7-hydroxycoumarins were synthesized and evaluated for antibacterial and anticancer toxicity. Two different synthetic procedures, conventional and microwave assisted were used, and the structures of the compounds were confirmed by IR, 1H, 13C NMR and...
Koichiro Harada et al.
Bioorganic & medicinal chemistry letters, 20(1), 272-275 (2009-12-04)
The synthesis and SAR studies of 3- and 4-substituted 7-hydroxycoumarins as novel 17beta-HSD3 inhibitors are discussed. The most potent compounds from this series exhibited low nanomolar inhibitory activity with acceptable selectivity versus other 17beta-HSD isoenzymes and nuclear receptors.
Yuan Shi et al.
Bioorganic & medicinal chemistry letters, 21(3), 956-960 (2011-01-11)
A series of new coumarin-based 1,2,4-triazole derivatives were designed, synthesized and evaluated for their antimicrobial activities in vitro against four Gram-positive bacteria (Staphylococcus aureus, MRSA, Bacillus subtilis and Micrococcus luteus), four Gram-negative bacteria (Escherichia coli, Proteus vulgaris, Salmonella typhi and...
Laura Piccagli et al.
Bioorganic & medicinal chemistry, 18(23), 8341-8349 (2010-10-29)
In the present study, a structured-based virtual screening (VS) of differently substituted furocoumarins and analogues has been carried out against nuclear factor kappa B (NF-κB), with the objective of selecting molecules able to inhibit the binding of this transcription factor...

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