Using CCOC(=O)C(C)C, COCCOCOc1c(C/C=C(\C)C=O)c(OC)c(C)c2c1C(=O)OC2 to produce CCOC(=O)C(C)(C)C(O)/C(C)=C/Cc1c(OC)c(C)c2c(c1OCOCCOC)C(=O)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.