Papot, Sebastien; Combaud, Damien; Bosslet, Klaus; Gerken, Manfred; Czech, Jorg; Gesson, Jean-Pierre Bioorganic and Medicinal Chemistry Letters, 2000, vol. 10, # 16 p. 1835 - 1837 doi: 10.1016/S0960-894X(00)00353-X