1. Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom
2. Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
3. Syngenta Crop Protection AG Schaffhauserstrasse, 4332 Stein, Switzerland