(2-氧代哌啶-4-基)乙酸乙酯

diethyl 2,6-dimethyl-4-oxopiperidine-3,5-dicarboxylate

1,2,3,4-四氢-2,7-萘啶

4,6-二羟基-2-(三氟甲基)烟酸乙酯

3-(乙氧基羰基)-1,4-二甲基-1H-吡咯-2-乙酸乙酯