Using CCO, CCc1nc(C)cc(=O)n1CCOc1ccc(CC(O)C(=O)O)cc1 to produce CCOC(=O)C(O)Cc1ccc(OCCn2c(CC)nc(C)cc2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.