4,4-diethylpyrazolidine-3,5-dione

2,2-diethyl-6-hydroxy-4,5-dimethylindene-1,3-dione

1,4-dibenzyl-6,6-diethyl-1,4-diazepane-5,7-dione

6,6-diethyl-1,4-diazepane-5,7-dione

bis(2,3,4,5,6-pentachlorophenyl) 2-methylpropanedioate