Using COc1cc(Br)c(OC)c2ccccc12, COC(=O)C1CCC2(C3(C)OCCO3)CC1C(=O)O2 to produce COc1cc(C(=O)C2CCC3(C4(C)OCCO4)CC2C(=O)O3)c(OC)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.