Here is another molecule of the year, on a topic close to my heart, the catenane systems <strong> 1 </strong> and the trefoil knot <strong> 2 </strong> [1] Such topology is closely inter-twinned with three dimensions (literally) and I always find that the flat pages of a journal are simply insufficient to do them justice. So I set about finding the 3D coordinates. The most obvious place to start is the supporting information.