Showing structure for methyl 2-(3-ethyl-7-{2-[(3e)-3-ethylidene-1h,2h,4h,6h,7h,12h,12bh-indolo[2,3-a]quinolizin-2-yl]-3-methoxy-3-oxopropyl}-1h,2h,3h,4h-indolo[2,3-a]quinolizin-2-yl)-3-hydroxypropanoate