Desloratadine Impurity 3 Catalogue D225636 CAS 117796-50-6 M.W 355.28 M.F C19H19BrN2 Specifications FAQs 8-bromo-11-(piperidin-4-ylidene)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine