Synonyms: Thiazolinobutazone;2-Thiazoline-2-ammonium-4-n-butyl-1,2-diphenyl-3,5-pyrazolidinedionate;4-Butyl-1,2-diphenyl-3-hydroxy-5-oxo-2-thiazolinyl-2-pyrazolidinium;Fordonal;LAS 11871;Phenylbutazone salt with 2-amino-2-thiazoline;TZB;3,5-Pyrazolidinedione, 4-butyl-1,2-diphenyl-, salt with 2-amino-2-thiazoline;4-Butyl-1,2-diphenylpyrazolidine-3,5-dione, compound with 4,5-dihydrothiazol-2-amine (1:1);4-butyl-1,2-diphenylpyrazolidine-3,5-dione - 4,5-dihydro-1,3-thiazol-2-amine (1:1)