Nerungsi, Chakkrapan; Wanitchang, Piangkhwan; Sahasithiwat, Somboon; Sadorn, Karoon; Kerdcharoen, Teerakiat; Thongpanchang, Tienthong
Tetrahedron Letters, 2010 , vol. 51, # 49 p. 6392 - 6395