NC77969
Methanimidamide, N′,N′′′-[7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-[3-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-propynyl]-7H-pyrrolo[2,3-d]pyrimidine-2,4-diyl]bis[N,N-dibutyl-