Using Cc1cccc(CCBr)c1, NC(=O)C(c1ccccc1)(c1ccccc1)C1CCNC1 to produce Cc1cccc(CCN2CCC(C(C(N)=O)(c3ccccc3)c3ccccc3)C2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.