Using CSc1ccc2c(c1)cc(C1(O)CCOCC1)n2S(=O)(=O)c1ccccc1 to produce CSc1ccc2c(c1)cc(C1=CCOCC1)n2S(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.