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

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