Modified L-nucleic acids

摘要

Modified L-nucleic acid (I) that comprises an L-nucleic acid part (Ia) conjugated to a non-L-nucleic acid part (Ib) so that the excretion from organisms is delayed, and dwell time in the organism is increased, relative to a compound comprising (Ia) only, is new.. (Ia) is a Spiegelmer (RTM). An independent claim is also included for a method for preparing (I).