Using NCC(=O)O, CCOC(=O)c1ncc2c(ccn2Cc2cccc(OC)c2)c1O to produce COc1cccc(Cn2ccc3c(O)c(C(=O)NCC(=O)O)ncc32)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.