Oxyphenbutazone

Oxyphenbutazone
Clinical data
Trade names	Tandearil, Tanderil
AHFS/Drugs.com	International Drug Names
ATC code	M01AA03 (WHO) M02AA04 (WHO) S01BC02 (WHO);
Legal status
Legal status	AU: Withdrawn; UK: Withdrawn; US: Withdrawn;
Identifiers
	IUPAC name (RS)-4-butyl-1-(4-hydroxyphenyl)-2-phenylpyrazolidine-3,5-dione;
CAS Number	129-20-4 ;
PubChem CID	104811;
DrugBank	DB03585 ;
ChemSpider	94610 ;
UNII	A7D84513GV;
KEGG	D08324 ;
ChEBI	CHEBI:76258 ;
ChEMBL	ChEMBL1228 ;
CompTox Dashboard (EPA)	DTXSID1045291 ;
ECHA InfoCard	100.004.489
Chemical and physical data
Formula	C19H20N2O3
Molar mass	324.380 g·mol−1
3D model (JSmol)	Interactive image;
Chirality	Racemic mixture
	SMILES O=C2N(c1ccc(O)cc1)N(C(=O)C2CCCC)c3ccccc3.O;
	InChI InChI=1S/C19H20N2O3.H2O/c1-2-3-9-17-18(23)20(14-7-5-4-6-8-14)21(19(17)24)15-10-12-16(22)13-11-15;/h4-8,10-13,17,22H,2-3,9H2,1H3;1H2 ; Key:CNDQSXOVEQXJOE-UHFFFAOYSA-N ;
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Oxyphenbutazone is a nonsteroidal anti-inflammatory drug (NSAID). It is a metabolite of phenylbutazone.

It was withdrawn from markets worldwide in mid-1980s due to bone marrow suppression and the risk of Stevens–Johnson syndrome.

In Scrabble, the word "oxyphenbutazone" is the highest-scoring word possible resulting in 1,780 points based on the NASPA word list of 2006. However, according to Mental Floss, there is no documentation that the word "oxyphenbutazone" has ever been successfully played on a Scrabble board, and it "probably never will be".