NC78739
Thymidine, thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-P-methylthymidylyloxy[2-[[[3-[[(1,1-dimethylethyl)diphenylsilyl]oxy]propyl]amino]carbonyl]-2-[[[3-[(1,4-dioxopentyl)oxy]propyl]amino]carbonyl]-1,3-propanediyl]oxy(methoxyphosphinylidene)-(3′→5′)-thymidylyl-(3′→5′)-thymidylyl-(3′→5′)-