methyl (E)-2-[(2S,12bS)-3-ethyl-8-methoxy-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-yl]-3-methoxyprop-2-enoate
group of stereoisomers with the chemical formula C₂₃H₃₀N₂O₄