1. School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
2. Avara Pharmaceutical Services, Shannon Industrial Estate, Shannon, Co. Clare, V14 FX09, Ireland
3. Biochemistry, School of Natural Sciences, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
4. Department of Chemical and Pharmaceutical Sciences, School of Life Sciences, Pharmacy & Chemistry, Kingston University, Penrhyn Road, Kingston upon Thames, KT1 2EE, U.K.