Sook, Kyung Kim; Moon, Byung-Sik; Ju, Hyun Park; Young, Il Seo; Hwa, Soo Koh; Yeo, Joon Yoon; Lee, Kap Duk; Yoon, Juyoung Tetrahedron Letters, 2005 , vol. 46, # 39 p. 6617 - 6620