Using COCCCC(C)c1cc(O)cc(O)c1, COC1=CCC(C(C)(C)O)=CC1 to produce COCCCC(C)c1cc(O)c2c(c1)OC1(OC)CCC(=C(C)C)C2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.