Ni, Zhi-Jie; Maclean, Derek; Holmes, Christopher P.; Murphy, Martin M.; Ruhland, Beatrice; Jacobs, Jeffrey W.; Gordon, Eric M.; Gallop, Mark A.
Journal of Medicinal Chemistry, 1996 , vol. 39, # 8 p. 1601 - 1608

Garrigues, Bernard; Lazraq Et, Mohamed
Tetrahedron Letters, 1986 , vol. 27, # 15 p. 1685 - 1686

Enzon, Inc.
Patent: US6153655 A1, 2000 ;

Kawashiro, Katsuhiro; Nishiguchi, Kazuhisa; Kurosaka, Ikuo
Bulletin of the Chemical Society of Japan, 1989 , vol. 62, # 7 p. 2404 - 2406