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