Patent ID: 7696345

Claim:
An oligomeric compound comprising at least one nucleoside having a bicyclic sugar moiety of the formula: wherein: Bx is a heterocyclic base moiety; P 4 is an internucleoside linkage to an adjacent monomer, OH, or a protected hydroxyl group; X 1 is O; substituents R c and R f together designate a biradical selected from —C(R a R b )—O—N(R a )— or —C(R a R b )—N(R a )—O—; R a and R b that are not part of the second ring are each H; R a and R b that are part of the second ring are each independently H, C 1 -C 12 alkyl or halogen; R g and R h are each H; one of R d and R e is a terminal group or an internucleoside linkage to an adjacent monomer and the other of R d and R e is H; and wherein at least one of P 4 , R d or R e is an internucleoside linkage to an adjacent monomer.