Showing structure for methyl (2z)-2-[(3r,5's,6'r,7's,8'as)-6'-ethyl-2-hydroxy-5'-(2-oxopropyl)-3',5',6',7',8',8'a-hexahydro-2'h-spiro[indole-3,1'-indolizin]-7'-yl]-3-methoxyprop-2-enoate