Title: Epirizole
CAS Registry Number: 18694-40-1
CAS Name: 4-Methoxy-2-(5-methoxy-3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine
Additional Names: 2-(3-methyl-5-methoxy-1-pyrazolyl)-4-methoxy-6-methylpyrimidine; 2-(3-methoxy-5-methylpyrazol-2-yl)-4-methoxy-6-methylpyrimidine; 1-(4-methoxy-6-methyl-2-pyrimidinyl)-3-methyl-5-methoxypyrazole; mepirizole
Manufacturers' Codes: DA-398
Trademarks: Mebron (Daiichi)
Molecular Formula: C11H14N4O2
Molecular Weight: 234.25
Percent Composition: C 56.40%, H 6.02%, N 23.92%, O 13.66%
Literature References: Prepn: Naito et al., ZA 6704936 (1968 to Daiichi Seiyaku), C.A. 70, 57876q (1969); Naito et al., Chem. Pharm. Bull. 17, 1467 (1969). Pharmacology and metabolism: Oshima et al., ibid. 1492; Takabatake et al., ibid. 18, 1900 (1970). Toxicity data: H. Ogura et al., J. Med. Chem. 15, 923 (1972).
Properties: Minute, white or cream-colored crystals from isopropyl ether, mp 90-92°. Characteristic odor, bitter taste. Sparingly sol in water. Sol in dil acids; freely sol in ethanol, benzene, dichloroethane. Also sol in ether, acetone. LD50 orally in mice: 820 mg/kg (Ogura).
Melting point: mp 90-92°
Toxicity data: LD50 orally in mice: 820 mg/kg (Ogura)
Therap-Cat: Analgesic, antipyretic, anti-inflammatory.
Keywords: Analgesic (Non-Narcotic); Anti-inflammatory (Nonsteroidal); Pyrazoles; Antipyretic.
Epithiazide EPN Epostane Epothilones Epoxiconazole

Systematic (IUPAC) name
Clinical data
AHFS/Drugs.com International Drug Names
Legal status Prescription only
Routes Oral
CAS number 18694-40-1
ATC code None
PubChem CID 3242
ChemSpider 3129
KEGG D01394 YesY
Chemical data
Formula C11H14N4O2 
Mol. mass 234.25 g/mol
 YesY (what is this?)  (verify)

Epirizole (INN) is a nonsteroidal anti-inflammatory drug.