1-Phenyl 2-(4' phenylthiazole-2'-yl) 4-n-butyl pyrazolidinedione sel de 2-pyridinopiperazine 3,5-Pyrazolidinedione, 4-butyl-1-phenyl-2-(4-phenyl-2-thiazolyl)-, compd. with 1-(2-pyridinyl)piperazine (1:1) 66181-60-0