4-butyl-1,2-diphenylpyrazolidine-3,5-dione-D9; 4-(Butyl-d9)-1,2-diphenyl-3,5-pyrazolidinedione; 1,2-Diphenyl-3,5-dioxo-4-(butyl-d9)pyrazolidine; Alindor-d9; Alkazone-d9; Antadol-d9; Benzone-d9; Betazed-d9; Diphebuzol-d9; Flexazone-d9; Robizone-d9; Shigrodin-d9; Tencodyne-d9; Uzone-d9; VAC-10-d9; Zolaphen-d9
