Complex sentence: The secondary structure is reinforced by the presence of a rigid β-amino acid which contains cyclohexane or cyclopentane fragments, these fragments generates more rigid structure and influence the opening angle of the foldamer.
Split into simpler sentences: The secondary structure is reinforced by the presence of a rigid β-amino acid, which contains cyclohexane or cyclopentane fragments. These fragments generate a more rigid structure and influence the opening angle of the foldamer.