C 7889 (OTTO) 2-Chloro-5-nitropyridine, 99% Cas 4548-45-2 - used in the synthesis of 4-(Benzoylaminophenoxy)phenol derivatives as androgen receptor antagonists. C 7889 (OTTO) 2-Chloro-5-nitropyridine, 99% Cas 4548-45 - used in the preparation of novel VEGFR2 kinase inhibitors used in controlling angiogenesis.