methyl 2-((2R,12bR,Z)-3-ethylidene-8-methoxy-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-yl)acetate

2-[(2R,12bS)-3-Eth-(Z)-ylidene-8-methoxy-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizin-2-yl]-3,3-dimethoxy-propionic acid methyl ester

methyl 2-((2R,3S,12bS)-3-ethyl-8-methoxy-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-yl)acetate

tert-butyl (S,E)-2-(4-((tert-butoxycarbonyl)oxy)but-2-en-1-yl)-5-methoxy-1-(4-methoxy-3,4-dioxobutyl)-1,2,3,4-tetrahydro-9H-pyrido[3,4-b]indole-9-carboxylate