| 摘要 |
Oligonucleotides which comprise from 2 to 200 identical or different residues of natural or synthetic nucleosides, which are linked via a nucleotide-bridging group Y, in which at least two of the nucleosides are, independently of each other, a residue of formula (Ia or Ib), in which R1 is OH or NH2, and B is a pyrimidine or purine residue or an analogue thereof, and at least two of these nucleosides are consecutive on at least one occasion.
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