Using COCC1CN(c2ccc(C3CCC4(CC3)OCCO4)cn2)C(=O)O1 to produce COCC1CN(c2ccc(C3CCC(=O)CC3)cn2)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.