Synonyms:3,5-Pyrazolidinedione,4-butyl-1-phenyl-2-(4-phenyl-2-thiazolyl)-,compd. with 1-(2-pyridinyl)piperazine (1:1);4-butyl-1-phenyl-2-(4-phenyl-1,3-thiazol-2-yl)pyrazolidine-3,5-dione;1-Phenyl 2-(4' phenylthiazole-2'-yl) 4-n-butyl pyrazolidinedione sel de 2-pyridinopiperazine;