Azumamides A–E: histone deacetylase inhibitory cyclic tetrapeptides from the marine sponge Mycale izuensis - Nakao, Y; Yoshida, S; Matsunaga, S; Shindoh, N; Terada, Y; Nagai, K; Yamashita, J K; Ganesan, A; van Soest, R WM; Fusetani, N (Angew Chem Int Ed Engl, 2006)