1,1,5-trimethylfuro[3,4-c]pyridine-3,4-dione

3,3,6,6-tetramethyl-2,4,5,7-tetrahydroacridine-1,8-dione

3-(氨基甲基烯)-2,4-戊烷二酮

2-(piperidin-1-ylmethylidene)propanedinitrile

2-(pyrrolidin-1-ylmethylidene)propanedinitrile