Loratadine EP Impurity D

Desloratadine - API (EP/BP); Rupatadine Fumarate - Impurity B (EP/BP); 8-Chloro-6,11-dihydro-11-(4-piperidinylidene)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine; ; 8-Chloro-5,6-dihydro-11-(piperidin-4-ylidene)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine; Loratadine Related Compound A (USP);