Using O=C(O)CBr, CC(C)(C)OC(=O)N1CCC(O)(c2nccs2)C1 to produce CC(C)(C)OC(=O)N1CCC(OCC(=O)O)(c2nccs2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.