Biogenetic-Like Cyclization of Denudatenone A to Dolabellane-Type Diterpenoids Induced by Samarium(II) Iodide: A Ketyl-Olefin Radical Coupling Reaction Forming Five-Membered Carbocycles - Sono, Masakazu; Hanaoaka, Megumi; Hashimoto, Toshihiro; Asakawa, Yoshinori; Tori, Motoo (Synlett, 2009)