(S)-2-Methoxy-3-((2S,3R,12bS)-2-methoxycarbonylmethyl-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizin-3-yl)-propionic acid methyl ester

17α,18α-isopropylidenedioxy-yohimban-16α-carboxylic acid methyl ester