Nguyen, Diem N.; Stump, Craig A.; Walsh, Eileen S.; Fernandes, Christine; Davide, Joseph P.; Ellis-Hutchings, Michelle; Robinson, Ronald G.; Williams, Theresa M.; Lobell, Robert B.; Huber, Hans E.; Buser, Carolyn A. Bioorganic and Medicinal Chemistry Letters, 2002 , vol. 12, # 9 p. 1269 - 1273