This work was carried out in the group of Prof. Christian Leumann.

References:

• P. S. Pallan, D. Ittig, A. Héroux, Z. Wawrzak, C. J. Leumann, M. Egli;
  "Crystal structure of tricyclo-DNA: an unusual compensatory change of two adjacent backbone torsion angles"
  Chem. Commun., 883-885, (2008); doi:10.1039/B716390H.