Morin (flavonol)

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Skeletal formula of morin
Ball-and-stick model of the morin molecule
IUPAC name
Other names
Morin hydrate
Calico Yellow
Toxylon pomiferum
Bois d'arc
Osage orange extract
3D model (JSmol)
ECHA InfoCard 100.006.858
Molar mass 302.238 g·mol−1
Density 1.799 g/mL
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Morin is a yellow chemical compound that can be isolated from Maclura pomifera (Osage orange), Maclura tinctoria (old fustic), and from leaves of Psidium guajava (common guava).[1] In a preclinical in vitro study, morin was found to be a weak inhibitor of fatty acid synthase with an IC50 of 2.33 μM.[2] Morin was also found to inhibit amyloid formation by islet amyloid polypeptide (or amylin) and disaggregate amyloid fibers.[3]

Morin exhibit inhibitory action against IgE-mediated allergic response. Morin treatment significantly down-regulated expressions of BLT2, NF-κB, and Th2-cytokine (TNF-α, IL-1β, IL-4, IL-6, and IL-13) in lungs of murine model of allergic asthma.[4]

Morin can be used to test for the presence of aluminium or tin in a solution, since it forms characteristically fluorescent coordination complexes with them.



  1. ^ a b c Rattanachaikunsopon, Pongsak; Phumkhachorn, Parichat (2007). "Bacteriostatic effect of flavonoids isolated from leaves of Psidium guajava on fish pathogens". Fitoterapia. 78 (6): 434–436. doi:10.1016/j.fitote.2007.03.015.
  2. ^ Tian, Wei-Xi (2006). "Inhibition of Fatty Acid Synthase by Polyphenols". Current Medicinal Chemistry. 13 (8): 967–977. doi:10.2174/092986706776361012.
  3. ^ Noor, Harris; Cao, Ping; Raleigh, Daniel P. (2012). "Morin hydrate inhibits amyloid formation by islet amyloid polypeptide and disaggregates amyloid fibers". Protein Science. 21 (3): 373–382. doi:10.1002/pro.2023. PMC 3375438.
  4. ^ Kandhare, Amit D.; Liu, Zihao; Mukherjee, Anwesha A.; Bodhankar, Subhash L. (2019). "Therapeutic Potential of Morin in Ovalbumin-induced Allergic Asthma Via Modulation of SUMF2/IL-13 and BLT2/NF-kB Signaling Pathway". Current Molecular Pharmacology. 12 (2): 122–138. doi:10.2174/1874467212666190102105052.