JOURNAL OF NATURAL PRODUCTS, v.64, no.11, pp.1474 - 1476, 2001
JOURNAL OF NATURAL PRODUCTS, v.64, no.6, pp.767 - 771, 2001
JOURNAL OF NATURAL PRODUCTS, v.64, no.5, pp.664 - 667, 2001
TETRAHEDRON LETTERS, v.42, no.16, pp.3005 - 3007, 2001
TETRAHEDRON LETTERS, v.42, no.10, pp.1965 - 1968, 2001