Using CCCCCCCCCCCCCCCc1cc2c(C(=O)O)cccc2[nH]1, CCO to produce CCCCCCCCCCCCCCCc1cc2c(C(=O)OCC)cccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.