1. G. N. Ferguson, C. Valant, J. Horne, H. Figler, B. L. Flynn, J. Linden, D. K. Chalmers, P. M. Sexton, A. Christopoulos and P. J. Scammells, J. Med. Chem. 19, 6165–6172 (2008).
2. G. Nikolakopoulos, H. Figler, J. Linden and P. J. Scammells, Bioorg. Med. Chem. 7, 2358–2365 (2006).
3. M. Gutschow and U. Neumann, J. Med. Chem. 10, 1729–1740 (1998).
4. R. F. Koebel, L. L. Needham and C. D. Blanton, J. Med. Chem. 2, 192–194 (1975).
5. R. L. Jarvest, S. C. Connor, J. G. Gorniak, L. J. Jennings, H. T. Serafinowska and A. West, Bioorg. Med. Chem. Letters. 13, 1733–1738 (1997).