1. Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K.
2. AstraZeneca Pharmaceutical Development, Global Chemical Development S46/4, Etherow, Silk Road Business Park, Macclesfield SK10 2NA, U.K.
3. Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, West Yorkshire HD1 3DH, U.K.
4. School of Chemistry, Food and Pharmacy, University of Reading, PO Box 224, Whiteknights, Reading RG6 6AP, U.K.