(6S,7R,9R,14aS,15R)-10,11,13-tris(allyloxy)-9-(hydroxymethyl)-2-methoxy-1-((2-methoxyethoxy)methoxy)-3,12,16-trimethyl-6,7,9,14,14a,15-hexahydro-5H-6,15-epiminobenzo[4,5]azocino[1,2-b]isoquinoline-7-carbonitrile