Desloratadine EP Impurity A Catalogue D225631 CAS 298220-99-2 M.W 30.83 M.F C19H20ClFN2 Specifications FAQs Synonyms: 4-[(11RS)-8-chloro-11-fluoro-6,11-dihydro-5H-benzo [5,6] cyclohepta [1,2-b]pyridin-11-yl]piperidine;8-chloro-11-fluoro-11-(piperidin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine