Stereoselective Synthesis of Novel Ptilomycalin A Analogs via Successive 1,3-Dipolar Cycloaddition Reactions and their Ca2+-ATPase Inhibitory Activity - Georgieva, Angelina; Hirai, Manabu; Hashimoto, Yuichi; Nakata, Tadashi; Ohizumi, Yasushi; Nagasawa, Kazuo (Synthesis, 2003)