Using CC(C)OP(=O)(CP(=O)(OC(C)C)OC(C)C)OC(C)C, CCOC(=O)CBr to produce CC(C)OP(=O)(OC(C)C)C(CC(=O)O)P(=O)(OC(C)C)OC(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.