Using O=C1Nc2ccccc2C12CCOCC2, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN1C(=O)C2(CCOCC2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.