N-ForMyl Oxcarbazepine;N-ForMyl-10,11-dihydro-10-oxo-;N-formyl-5-oxo-6H-benzo[b][1]benzazepine-11-carboxamide;Oxcarbazepine Impurity 18;Oxcarbazepine Impurity 10(Oxcarbazepine EP Impurity K);5H-Dibenz[b,f]azepine-5-carboxamide, N-formyl-10,11-dihydro-10-oxo-;Oxcarbazepine EP Impurity K (Oxcarbazepine USP Related Compound A);Oxcarbazepine Related Compound A (10 mg)