Feprazone

Feprazone
Clinical data
AHFS/Drugs.com	International Drug Names
ATC code	M02AA16 (WHO) ;
Identifiers
	IUPAC name 4-(3-methylbut-2-enyl)-1,2-di(phenyl)pyrazolidine-3,5-dione;
CAS Number	30748-29-9 ;
PubChem CID	35455;
ChemSpider	32612 ;
UNII	7BVX6J0CGR;
KEGG	D01305 ;
CompTox Dashboard (EPA)	DTXSID3023051 ;
ECHA InfoCard	100.045.735
Chemical and physical data
Formula	C20H20N2O2
Molar mass	320.392 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES O=C2N(c1ccccc1)N(C(=O)C2C\C=C(/C)C)c3ccccc3;
	InChI InChI=1S/C20H20N2O2/c1-15(2)13-14-18-19(23)21(16-9-5-3-6-10-16)22(20(18)24)17-11-7-4-8-12-17/h3-13,18H,14H2,1-2H3 ; Key:RBBWCVQDXDFISW-UHFFFAOYSA-N ;
	(verify)

Feprazone (or prenazone) is a drug used for joint and muscular pain.^[1]

It is an analog of phenylbutazone but instead of a n-butyl group it is prenylated.

^ Koyama T, Izawa Y, Wada H, Makita T, Hashimoto Y, Enomoto M (June 1982). "Toxicological aspects of feprazone, a new nonsteroidal anti-inflammatory drug". Toxicology and Applied Pharmacology. 64 (2): 255–70. doi:10.1016/0041-008X(82)90222-8. PMID 7123554.