1. Non-linearity and Complexity Research Group, System Analytics Research Institute, School of Engineering and Applied Science, Aston University, B4 7ET Birmingham, United Kingdom
2. Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona, Barcelona, Spain
3. Department of Chemistry, The Scripps Research Institute, La Jolla, California 93207, USA
4. Department of Molecular Evolution, Centro de Astrobiología (CSIC-INTA), Carretera Ajalvir Kilómetro 4, 28850 Torrejón de Ardoz, Madrid, Spain