NC42679
5′-Deoxy-8-[[[2-(diphenylphosphinyl)-4-[21-[(3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1,17-dioxo-6,9,12-trioxa-2,16-diazaheneicos-1-yl]phenyl]methoxymethylene]amino]-5′-[[2-[(9-β-D-ribofuranosyl-9H-purin-6-yl)amino]ethyl]amino]adenosine