1,2,5-三甲基-1H-吡咯-3-羧酸甲酯

methyl 3-(2-methoxy-2-oxoethylidene)cyclopenta-1,4-dienecarboxylate

dimethyl 2-(2-methoxy-2-oxoethylidene)cyclopenta-3,5-diene-1,3-dicarboxylate

3-羟基-2-噻吩甲酸甲酯

1-苄基-2,5-二氢-1H-吡咯-3-羧酸甲酯