Nb-(Z-2'-iodo-2'-butenyl)tryptophan benzyl ester

(2R,3S,6R,12bS)-3-Ethyl-2-methoxycarbonylmethyl-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizine-6-carboxylic acid benzyl ester

(2R,6R,12bS)-3-Eth-(E)-ylidene-2-methoxycarbonylmethyl-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizine-6-carboxylic acid benzyl ester

deformylgeissoschizine

(E)-2-((2S,3S,12bS)-3-Ethyl-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizin-2-yl)-3-hydroxy-acrylic acid methyl ester