OLGIONUCLEOTIDE AND ARTIFICIAL NUCLEOSIDE HAVING GUANIDINE BRIDGE

摘要

This oligonucleotide or pharmaceutically acceptable salt thereof contains a compound represented by formula I or II or a salt thereof, and at least one nucleoside structure represented by formula I or II . Thus provided is a nucleic acid molecule for oligonucleotides having high specificity and binding affinity to a target nucleic acid , and exhibiting high nuclease resistance.