TETRAHEDRON LETTERS, vol. 50, no. 21, page. 2545 - 2547, 2009-05-27
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, vol. 18, no. 14, page. 3910 - 3913, 2008-07-15
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 27, no. 5, page. 613 - 630, 2006-05-20