(+/-)-cis-5-ethyl-1-methyl-2-oxo-4-piperidineacetic acid

(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

(+/-)-cis-1,5-diethyl-2-oxo-4-piperidineacetic acid

(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

(+/-)-cis-1,5-diethyl-2-oxo-4-pyridineacetic acid ethyl ester