Ligand-binding nucleic acid complex

A ligand-binding nucleic acid complex in which a nucleic acid molecule that regulates expression or editing of a target gene or a transcription or translation product thereof binds to a compound represented by a formula below or a pharmaceutically acceptable salt with or without a linker:

• wherein
• R1 represents a C6-C50 linear or branched carbon chain, and the carbon chain may comprise at least one partial structure, bond, or hetero atom selected from among a double bond, a triple bond, carbocyclic Z, O, S, and N, and/or carbonyl and at least one Y as a substituent;
• R2 and R4 each represent (CH2)m;
• m is an integer of 0 to 4;
• R3 and R5 are each selected from the group consisting of —H, —X—, —XW, —P(═X)(—XW)2, and —XP(═X)(—XW)2;
• X is selected from the group consisting of O, S, and NH;
• Y is selected from the group consisting of alkoxy, alkenyloxy, alkynyloxy, aralkyloxy, acyl, alkylamino, alkylthio, acylamino, alkoxycarbonyl, alkoxycarbonylamino, acyloxy, alkylcarbamoyl, nitro, halogen, alkyl halide, hydroxy, carboxy, sulfonic acid, sulfonic acid derivative, azide, and thiol;
• Z represents a C1-C30 linear or branched carbon chain, the carbon chain is selected from the group consisting of cycloalkylalkyl, arylalkyl, heterocycloalkylalkyl, and heteroarylalkyl, and the carbon chain may comprise a bond or hetero atom selected from among a double bond, a triple bond, O, S, N, sulfinyl, sulfonyl, and/or carbonyl and at least one Y as a substituent;
• and
• W independently represents H or a C1-C60 linear or branched carbon chain, and the carbon chain may comprise at least one partial structure, bond, or hetero atom selected from among a double bond, a triple bond, carbocyclic Z, O, S, and N, and/or carbonyl and at least one Y as a substituent.