Using COCCOCCOS(=O)(=O)c1ccc(C)cc1, CC1(C)OC(=O)c2ccc(O)cc2O1 to produce COCCOCCOc1ccc2c(c1)OC(C)(C)OC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.