4-氯-5,6-二氢吡啶并[3,4-d]嘧啶-7(8h)-羧酸叔丁酯

7-苄基-2,4-二氯-5,6,7,8-四氢吡啶并[3,4-D]嘧啶

3-氧代-4-哌啶羧酸甲酯

ethyl 1,2-dibenzyl-3-oxopiperidine-4-carboxylate

3-氧代-4-哌啶甲酸乙酯