RG-101 is a hepatocyte-targeted N-acetylgalactosamine conjugated oligonucleotide that functions as an antagonist for miR-122, an essential host factor in the replication of the hepatitis C virus (HCV).

RG-101 is a mixed chemistry phosphorothioate oligonucleotide inhibitor of miR-122 that is linked to a multivalent N-acetylgalactosamine carbohydrate structure designed to enhance uptake of the oligonucleotide by hepatocytes through binding to the asialoglycoprotein receptor on hepatocytes[1].