4-ethyl-1,2-diphenylpyrazolidine-3,5-dione

5-甲氧基-1,2-二(苯基)吡唑-3-酮

4-(3-methylbut-3-enyl)-1,2-diphenylpyrazolidine-3,5-dione

4-亚苄基-1,2-二苯基-吡唑烷-3,5-二酮

1,2-diphenyl-4-(thiophen-2-ylmethylidene)pyrazolidine-3,5-dione