Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Dĭŏchăres, is, m., a freedman of Caesar, Cic. Att. 11, 6, 7.
Hence, Dĭŏchă-rīnus, a, um, adj., of Diochares: litterae, id. ib. 13, 45, 1.