(4-Butyl-3,5-diphenyl-4-pyrazolidinyl)methyl 4-chlorbenzoat 23111-34-4 4-Chlorbenzoesaeure ester mil 4-butyl-4-(hydroxymethyl)-1,2-diphenyl-3,5-pyrazolidindion AE 9 Feclobuzon Feclobuzone Feclobuzone [INN] Feclobuzonum p-Chlorobenzoic acid, ester with 4-butyl-4-(hydroxymethyl)-1,2-diphenyl-3,5-pyrazolidinedione.