Using CCOC(OCC)OCC, CCc1nc(N)nc(N)c1OCCCOc1ccccc1CCC(=O)O to produce CCOC(=O)CCc1ccccc1OCCCOc1c(N)nc(N)nc1CC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.