Potent achiral agonists of the ghrelin (growth hormone secretagogue) receptor. Part I: Lead identification. by Heightman, T, Scott, J, Longley, M, Bordas, V, Dean, D, Elliott, R, Hutley, G, Witherington, J, Abberley, L, Passingham, B, Berlanga, M, de Los Frailes, M, Wise, A, Powney, B, Muir, A, McKay, F, Butler, S, Winborn, K, Gardner, C, Darton, J, Campbell, C, Sanger, G