Loratadine EP Impurity D

Chemical Name:  8-Chloro-11-(piperidin-4-ylidene)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine (as per EP) ; 8-Chloro-5,6-dihydro-11-(piperidin-4-ylidene)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine (as per USP)

Synonym: Desloratadine ; Loratadine USP Related Compound A