Nonpeptidic alpha(v)beta(3) Integrin Antagonist Libraries: On-Bead Screening and Mass Spectrometric Identification without Tagging The authors acknowledge technical assistance from M. Urzinger, B. Cordes, M. Kranawetter, and A. Schröder. Financial support of the Fonds der Chemischen Industrie and the Deutsche Forschungsgemeinschaft is gratefully acknowledged