3-甲基戊二酰亚胺

5-Cyan-4-methyl-pentansaeure

甲基丁二酸

1,1-二甲基呋喃并[3,4-c]吡啶-3,4(1H,5H)-二酮

4-chloro-1,1-dimethylfuro[3,4-c]pyridin-3-one