甲醛

1-(8-氮杂双环[3.2.1]辛-2-烯-2-基)乙酮

2-(2-methyl-1,3-dioxolan-2-yl)-8-azabicyclo[3.2.1]oct-2-ene

N-Boc-吡咯

tert-butyl 2-propionyl-8-azabicyclo[3.2.1]octa-2,6-diene-8-carboxylate