1. School of Chemistry, University of Bristol, Bristol, BS8 1TS, United Kingdom
2. Department of Medicinal Chemistry, Research and Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, SE 43183 Mölndal, Sweden
3. Chemical Development, Pharmaceutical Technology & Development, Operations, Astra Zeneca, Charter Way, Macclesfield, SK10 2NA, United Kingdom
4. Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, United Kingdom