4-butyl-1,2-diphenylpyrazolidine-3,5-dione; 4-Butyl-1,2-diphenyl-3,5-pyrazolidinedione; 1,2-Diphenyl-3,5-dioxo-4-butylpyrazolidine; Alindor; Alkazone; Antadol; Benzone; Betazed; Diphebuzol; Flexazone; Robizone; Shigrodin; Tencodyne; Uzone; VAC-10; Zolaphen
