(2R,3R,11bS)-(+)-9-benzyloxy-2-(6-benzyloxy-3,4-dihydro-7-methoxy-1-isoquinolyl)methyl-3-ethyl-1,3,4,6,7,11b-hexahydro-10-methoxy-2H-benzoquinolizine

(3R,4S)-6-ethoxy-3-ethyl-2,3,4,5-tetrahydro-4-pyridineacetic acid ethyl ester

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

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