Using O=C(CCCCCBr)c1ccccc1, CC(C)(C)OC(=O)NCC1(O)CCNCC1 to produce CC(C)(C)OC(=O)NCC1(O)CCN(CCCCCC(=O)c2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.