4-(4-氯苄基)哌啶

4-(4’-氟苄基)哌啶

螺[吲哚啉-3,4’-哌啶]-1’-羧酸叔丁酯

2-氰基-7-氮杂螺[3.5]壬烷-7-羧酸叔丁酯

7-叔丁氧基羰基-7-氮杂螺[3.5]-2-壬醇