oxyphenbutazone oxyphenbutazone oxyphenbutazone is a nonsteroidal anti-inflammatory drug (nsaid). it is a metabolite of phenylbutazone. oxyphenbutazoneclinical datatrade namestandearil, tanderilahfs/drugs.cominternational drug namesatc codem01aa03 (who) m02aa04 (who) s01bc02 (who)legal statuslegal status au: withdrawn uk: withdrawn us: withdrawn identifiers iupac name (rs)-4-butyl-1-(4-hydroxyphenyl)-2-phenylpyrazolidine-3,5-dione cas number129-20-4 ypubchem cid104811drugbankdb03585 ychemspider94610 yuniia7d84513gvkeggd08324 ychebichebi:76258 nchemblchembl1228 ncomptox dashboard (epa)dtxsid1045291 echa infocard100.004.489 chemical and physical dataformulac19h20n2o3molar mass324.380 g·mol−13d model (jsmol)interactive imagechiralityracemic 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 ykey:cndqsxoveqxjoe-uhfffaoysa-n y ny (what is this?) (verify) it was withdrawn from markets worldwide in mid-1980s due to bone marrow suppression and the risk of stevens–johnson syndrome. the word "oxyphenbutazone" is, as far as we know, the highest-scoring word under american rules for scrabble (twl06 dictionary), with a maximum possible score of 1,780 points when played over 3 triple word score lanes.