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Cyclopentane stereochemistry is (S,S), and tetrahydrofuran stereochemistry is (R,R); B* = thf residue, and B# = cp residue. PNA and thyclotide sequences are written from the N- to C-terminal. In each oligomer, 2-aminoethoxy-2-ethoxy acetic acid (AEEA) is the first residue at the C-terminal, and the N-terminal is a free amine.
