Using O=C=Nc1ccc(-c2n[nH]c3c2Cc2ccccc2-3)cc1, CCN(CC)CCO to produce CCN(CC)CCOC(=O)Nc1ccc(-c2n[nH]c3c2Cc2ccccc2-3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.