Using CCOC(=O)CCC(CC(C)=O)(C(=O)OCC)C(=O)OCC, CC(C)O to produce CCOC(=O)C1(C(=O)OCC)CC(=O)CC(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.