Using OCCO, CC(C)(C)OC(=O)N1CCNC(=O)C1C(=O)c1ccccc1 to produce CC(C)(C)OC(=O)N1CCNC(=O)C1C1OCCOc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.