allyl (6aS,7R,13S,16R)-5-(allyloxy)-8,10,14-trihydroxy-16-(hydroxymethyl)-9-methoxy-4-methyl-6,6a,7,13,14,16-hexahydro-12H-7,13-epiminobenzo[4,5]azocino[1,2-b][1,3]dioxolo[4,5-h]isoquinoline-17-carboxylate