2-Cyano-pyrimidines:  A New Chemotype for Inhibitors of the Cysteine Protease Cathepsin KAltmann, Eva; Aichholz, Reiner; Betschart, Claudia; Buhl, Thomas; Green, Jonathan; Irie, Osamu; Teno, Naoki; Lattmann, René; Tintelnot-Blomley, Marina; Missbach, Martin · Journal of Medicinal Chemistry · 2007