Using O=C1CCC(=O)N1Br, Cc1nc2ccccc2n1C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)n1c(CBr)nc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.