Using C=CC(=O)OC(C)(C)C, O=C1CNc2ncc(Br)cc2CN1 to produce CC(C)(C)OC(=O)C=Cc1cnc2c(c1)CNC(=O)CN2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.