7-chloro-3-phenylpyrano[3,4-e][1,3]oxazine-2,4,5-trione

1,2-二氢-4-羟基-1-甲基-2-氧代-3-喹啉羧酸乙酯

1,3-二丁基-嘧啶-2,4,6-三酮

1,4,7,10,13,16-hexaoxacyclononadecane-17,19-dione

1-methyl-7-(trifluoromethyl)-5H-1,5-benzodiazepine-2,4-dione