N-(2-(diethylamino)ethyl)-2-hydroxyquinoline-4-carboxamide;Cinchocaine EP Impurity C;Dibucaine Impurity C);Cinchocaine EP Impurity C (Dibucaine Impurity C);4-Quinolinecarboxamide, N-[2-(diethylamino)ethyl]-1,2-dihydro-2-oxo-;Cinchocaine impurity;Cinchocaine Hydrochloride Impurity C;Cinchocaine Hydrochloride EP Impurity C