59702-21-5
1-苄基-2-氧代哌嗪
→
~70%
183269-83-2
4-benzyl-1-oxido-2,3-dihydropyrazin-1-ium-5-one
100-39-0
溴化苄
78551-60-7
4-苄基-3-氧代哌嗪-1-羧酸叔丁酯