Using BrCCOCCBr, COc1c(C)cnc(Cn2nc3cc(CN)c4c-3c(n2)C(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)=NSC4)c1C to produce COc1c(C)cnc(Cn2nc3cc(CN4CCOCC4)c4c-3c(n2)C(N)=NSC4)c1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.