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Catalog No.
COMT inhibitor
Grouped product items
SizePriceStock Qty
10mM (in 1mL DMSO)
In stock
In stock
In stock

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Entacapone is a second-generation catechol-O-methyltransferase (COMT) inhibitor that potently inhibits rat liver total COMT with the half maximal inhibition concentration IC50 and inhibition constant Ki values of 20.1 nM and 10.7 nM respectively. The IC50 values of entacapone against rate liver soluble COMT (S-COMT) and rat liver membrane-bound COMT (MB-COMT) are 14.3 nM and 73.3 nM respectively [1].

Entacapone has succbe used as an adjunct to standard levodopa-dopa decarboxylase inhibitor therapy in patients with Parkinson’s disease (PD), for its abilities to increase the bioavailability of levodopa by inhibiting the generation of 3-O-methyldopa and to prolong the duration and clinical benefit of levodopa [1].


[1] Forsberg M, Lehtonen M, Heikkinen M, Savolainen J, Järvinen T, Männistö PT. Pharmacokinetics and pharmacodynamics of entacapone and tolcapone after acute and repeated administration: a comparative study in the rat. J Pharmacol Exp Ther. 2003 Feb;304(2):498-506.

Chemical Properties

StorageStore at -20°C
Cas No.130929-57-6
Solubility≥13.1 mg/mL in DMSO, ≥12.65 mg/mL in EtOH with ultrasonic, insoluble in H2O
Chemical Name(E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide
SDFDownload SDF
Canonical SMILESCCN(CC)C(=O)C(=CC1=CC(=C(C(=C1)O)O)[N+](=O)[O-])C#N
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.

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