N-{[(6R,7S,9R,14aS,15S)-1,7-dihydroxy-2,11-dimethoxy-3,12,16-trimethyl-10,13-dioxo-6,7,9,10,13,14,14a,15-octahydro-5H-6,15-epiminoisoquino[3,2-b][3]benzazocin-9-yl]methyl}-L-alaninamide