Seefeld, Mark A; Miller, William H; Newlander, Kenneth A; Burgess, Walter J; Payne, David J; Rittenhouse, Stephen F; Moore, Terrance D; DeWolf Jr., Walter E; Keller, Paul M; Qiu, Xiayang; Janson, Cheryl A; Vaidya, Kalindi; Fosberry, Andrew P; Smyth, Martin G; Jaworski, Deborah D; Slater-Radosti, Courtney; Huffman, William F
Bioorganic and Medicinal Chemistry Letters, 2001 , vol. 11, # 17 p. 2241 - 2244

Hoffmann-La Roche
Patent: US2642438 , 1949 ;