Known as: 3H-Pyrazol-3-one, 4-butyl-1,2-dihydro-5-hydroxy-1,2-diphenyl-, compd. with 3-(3-(dimethylamino)propoxy)-1-(phenylmethyl)-1H-indazole (1:1), 4-butyl-1,2-diphenyl-5-hydroxy-3-oxo-pyrazolidine compd. with 1-benzyl-3,3-(dimethylamino)propoxy-1H-indazole