2,3,6,7-四氢氮杂卓-1-甲酸叔丁酯

1-苄基-3-甲氧基羰酰-4-哌啶酮

N-苄基哌啶酮

6-苄基-1-噁-6-氮杂螺[2.5]辛烷

4-氧代哌啶-3-羰酸甲酯 盐酸盐