Using COCCBr, CNC(=O)c1ccccc1Nc1nc(Nc2ccc3c(c2)C2CCC3CNC2)ncc1Cl to produce CNC(=O)c1ccccc1Nc1nc(Nc2ccc3c(c2)C2CCC3CN(CCOC)C2)ncc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.