Jonas Spengler, Yvonne Wagenhäuser, Marit Kuhstrebe, Frank Würthner. "Flexibility Induced by Four Heptagons: A Negatively Curved Polycyclic Aromatic Hydrocarbon Cut-Out of Schwarzite P216." Journal of the American Chemical Society (2026). https://doi.org/10.1021/jacs.5c22358