Desloratadine 3-Hydroxy Impurity

Chemical Name: Desloratadine 3-Hydroxy Impurity ; 8-Chloro-3-hydroxy-6,11-dihydro-11-(4-piperidinylidene)-5H-benzo[5,6]cyclohepta[1,2-b] pyridine ; 4-(8-Chloro-3-hydroxy-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-piperidine ;