Yang, Shu-Wei; Abdel-Kader, Maged; Malone, Stan; Werkhoven, Marga C. M.; Wisse, Jan H.; Bursuker, Isia; Neddermann, Kim; Fairchild, Craig; Raventos-Suarez, Carmen; Menendez, Ana T.; Lane, Kate; Kingston, David G. I. Journal of Natural Products, 1999 , vol. 62, # 7 p. 976 - 983