saframycin F

N-[[(6R)-7α-Cyano-6,7,9,10,13,14,14aα,15-octahydro-1,4-dihydroxy-2,11-dimethoxy-3,12,16-trimethyl-5,10,13-trioxo-6α,15α-epimino-5H-isoquino[3,2-b][3]benzazocin-9β-yl]methyl]-2-oxopropionamide