5-?[5-?O-?[bis(4-?methoxyphenyl)?phenylmethyl]?-?3-?O-?[[bis(1-?methylethyl)?amino]?(2-?cyanoethoxy)?phosphino]?-?2-?O-?[(1,?1-?dimethylethyl)?dimethylsilyl]?-?β-?D-?ribofuranosyl]?-?1-?methyl-2,?4(1H,?3H)?-?pyrimidinedione is a modified ribonucleoside analogue suitable for incorporating into small interfering RNA (SiRNA) to enhance RNA stability in biological applications such as gene silencing.
