(4R,5R)-(+)-1-(4-benzyloxy-3-methoxyphenethyl)-5-ethyl-2-oxo-4-piperidineacetic acid ethyl ester

(2R,3R,11bS)-(-)-10-benzyloxy-3-ethyl-1,3,4,6,7,11b-hexahydro-9-methoxy-2H-benzoquinolizine-2-acetic acid ethyl ester

2-[1-(3,4-dimethoxy-phenethyl)-3-ethyl-piperidin-4-yl]-ethanol