OLIGONUCLEOTIDE AND ARTIFICIAL NUCLEOSIDE HAVING GUANIDINE BRIDGE

摘要

An oligonucleotide or a pharmacologically acceptable salt thereof of the present invention contains a compound represented by formula I or II or a salt thereof, and at least one of nucleoside structures represented by formula I' or II' . According to the present invention, provided is a nucleic acid molecule for oligonucleotides having high binding affinity and specificity to a target nucleic acid, and exhibiting high nuclease resistance.