NC77420
3′-Guanylic acid, P-[2-chloro-4-(1,1-dimethylethyl)phenyl]-5′-O-(1,4-dioxopentyl)-N-(4-methoxybenzoyl)-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)adenylyl-(3′→5′)-N-benzoyl-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-, 2-chloro-4-(1,1-dimethylethyl)phenyl 2,2,2-tribromoethyl ester