Using CCOC(=O)c1cnn(-c2ccc(OCCOC(C)(C)C)cc2)c1C to produce Cc1c(C(=O)O)cnn1-c1ccc(OCCOC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.