Using CC(C)(C)OC(=O)N1CCC(CBr)CC1, O=C1CN(C(=O)OCc2ccccc2)CCN1 to produce CC(C)(C)OC(=O)N1CCC(CN2CCN(C(=O)OCc3ccccc3)CC2=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.