2,4(1H,3H)-Pyrimidinedione, 1-[(5E)-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-5,6-dideoxy-6-(diethoxyphosphinyl)-2-O-methyl-β-D-ribo-hex-5-enofuranosyl]- [ 2361324-80-1 ]