乙基4,5,5-三甲基-2-氧代-2,5-二氢-3-呋喃羧酸酯

3-imino-1,1-dimethylfuro[3,4-c]pyridin-4(5H)-one

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

4-(2-(dimethylamino)vinyl)-5,5-dimethyl-2-oxo-2,5-dihydrofuran-3-carbonitrile

4,5,5-三甲基-2-氧代-2,5-二氢-3-呋喃甲腈