Using BrCC(CBr)(CBr)CBr, CC1(CO)COC1 to produce CC1(COCC(COCC2(C)COC2)(COCC2(C)COC2)COCC2(C)COC2)COC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.