Dehydro EpinastineEpastine EP Impurity A9,13β-Dehydro epinastine9,13b-Dehydro EpinastineEpinastine EP Impurity A Monomer9H-Dibenz[c,f]imidazo[1,5-a]azepin-3-amine9H-dibenzo[c,f]imidazo[1,5-a]azepin-3-amineEpinastine EP Impurity A (Dehydro Epinastine)Epinastine Impurity 1(Epinastine EP Impurity A Monomer)Epinastine Impurity 1 Monomer (Epinastine EP Impurity A)