BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 19, no. 8, page. 816 - 817, 1998-08-20
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, vol. 8, no. 11, page. 1313 - 1316, 1998-06-02
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, no. 2, page. 359 - 365, 1998-01-21