Using COc1cccc2ncc(Cl)nc12, CC(C)(C)OC(=O)NC1CCN(CCO)CC1 to produce COc1cccc2ncc(OCCN3CCC(NC(=O)OC(C)(C)C)CC3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.