| CPC C12N 15/115 (2013.01) [A61K 47/42 (2013.01); A61P 35/00 (2018.01)] | 11 Claims |

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1. An oligonucleotide variant having a structure of Formula 1 below:
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wherein, N and M are independently deoxyuridine (dU), deoxycytidine (dC), uridine (U), or cytidine (C), in which a halogen or hydroxy group is bound to 5- or 2′-position thereof; x and y are independently integers of 0 to 10 with a proviso that x and y are not simultaneously 0, n is an integer of 4 to 6; and m is an integer of 4 to 6.
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