Armer, Richard E.; Barlow, Jacqueline S.; Chopra, Narinder; Dutton, Christopher J.; Greenway, David H.J.; Greenwood, Sean D.W.; Lad, Nita; Shaw, Jonothan; Thompson, Adrian P.; Thong, Kam-Wah; Tommasini, Ivan Bioorganic and Medicinal Chemistry Letters, 1999 , vol. 9, # 16 p. 2425 - 2430