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

(+/-)-1-<2-(3,4-dimethoxyphenyl)-2-hydroxyethyl>-3-ethyl-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

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

(+/-)-trans-1-<2-(5,6-Dimethoxy-1H-indol-3-yl)-2-hydroxyethyl>-5-ethyl-2-oxo-4-piperidineacetic Acid Ethyl Ester