Using CCOC(=O)CCCc1c(COCCOC2CCCCO2)nn2c(CC)ccc2c1-c1cncc(Br)c1 to produce CCOC(=O)CCCc1c(COCCO)nn2c(CC)ccc2c1-c1cncc(Br)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.