methyl (2S,6R)-(+)-2-(tert-butyldimethylsiloxymethyl)-6-(hydroxymethyl)piperidine-1-carboxylate

2-methyl-5,6,9,10,11,12,13,13a-octahydro-8H-9,13-epiminoazocino[2,1-a]isoquinolin-8-one

3-[2-(3,5-Dimethoxy-phenyl)-ethyl]-2,4-dioxo-3,9-diaza-bicyclo[3.3.1]nonane-9-carboxylic acid benzyl ester

2,4-Dioxo-3-(2-p-tolyl-ethyl)-3,9-diaza-bicyclo[3.3.1]nonane-9-carboxylic acid benzyl ester

2-fluoro-5,6,9,10,11,12,13,13a-octahydro-8H-9,13-epiminoazocino[2,1-a]isoquinolin-8-one