Zaragozic acid A/squalestatin S1: Synthetic and retrosynthetic studies - Kyriacos C. Nicolaou; Eddy W. Yue; Yoshimitsu Naniwa; Francesco De Riccardis; Alan Nadin; James E. Leresche; Susan La Greca; Zhen Yang (Angewandte Chemie (International Edition in English), 1994)