Using COCCn1c(C)nc2cc(C(=O)N(C)C)cc(OCc3ccccc3)c21 to produce COCCn1c(C)nc2cc(C(=O)N(C)C)cc(O)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.