146033-02-5

SC-51089 (146033-02-5) is a prostaglandin E2 (EP1 receptor) antagonist (pA2=6.5, guinea pig ileum muscle strip assay )1,4. Possesses analgesic activity in vivo (rodent ED50= 6.8 mg/kg)1,2,4. SC-51089 does not inhibit COX11 and does not block PGE1 induced hyperalgesia3.

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8-Chloro-dibenz[b,f][1,4]oxazepine-10(11H)-carboxylic acid 2-[1-oxo-3-(4-pyridinyl)propyl]hydrazide monohydrochloride is a potent and selective antagonist of EP1 receptors.

A selective EP1 prostanoid receptor antagonist that attenuates prostaglandin E2-induced neuronal cell death in vitro and slows tumor growth in vivo. Its neuroprotective effect may potentially have therapeutic application in human stroke.

Selective EP 1 prostanoid receptor antagonist (K i values are 1.3, 11.2, 17.5, 61.1, > 100, > 100, > 100, >100 and > 100 μ M for EP 1 , TP, EP 3 , EP 2 , EP 4 , FP and DP receptors respectively). Attenuates PGE 2 -induced neuronal cell death in vitro and slows tumor growth in vivo .

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1) Hallinan et al. (1993), N-substituted dibenzoxazepines as analgesic PGE2 antagonists; J. Med. Chem., 36 2) Malmberg et al. (1994), Antinociceptive effect of spinally delivered prostaglandin E receptor antagonists in the formalin test on rat; Neurosci. Lett., 173 193 3) Khasar et al. (1994), Comparison of prostaglandin E1- and prostaglandin E2 hyperalgesia in the rat; Neuroscience, 62 345 4) Hallinan et al. (1996), Aminoacetyl moiety as a potential surrogate for diacylhydrazine group of SC-51089, a potent PGE2 antagonist, and its analogs; J. Med. Chem., 39 609