benzyl 7,7-dimethoxy-6-oxo-2-azabicyclo<2.2.2>octane-2-carboxylate

2-(indol-3-yl-acetyl)-7,7-dimethoxy-2-aza-bicyclo[2.2.2]octan-6-one

benzyl 5-(1,3-dioxolan-2-ylmethyl)-3,4-epoxypiperidine-1-carboxylate