396653-31-9
→
~98%
203661-69-2
2-氧代-7-氮杂螺[3.5]壬烷-7-甲酸叔丁酯
159635-49-1
N-Boc-4-亚甲基哌啶
+
76-02-8
三氯乙酰氯
~14%