1-ethyl-9,10-dimethoxy-2-oxo-1,3,4,6,7,11b-hexahydro-2
H-pyrido[2,1-
a]isoquinoline-3-carboxylic acid ethyl ester;1-Aethyl-9,10-dimethoxy-2-oxo-1,3,4,6,7,11b-hexahydro-2
H-pyrido[2,1-
a]isochinolin-3-carbonsaeure-aethylester;1-Ethyl-9,10-dimethoxy-2-oxo-1,2,3,4,6,7-hexahydro-11bH-benzo
chinolizin-carbonsaeure-3-ethylester