Using CCOC(=O)c1oc2cccc(OCCCN(C(=O)OC(C)(C)C)C(C)(C)C)c2c1C, C1CCOC1 to produce CCCc1c(C(=O)OCC)oc2cccc(OCCCN(C(=O)OC(C)(C)C)C(C)(C)C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.