Using O=C1OCCC1Br, O=C(NN1CCNCC1)c1cnc(-c2ccccc2)nc1 to produce O=C(NN1CCN(C2CCOC2=O)CC1)c1cnc(-c2ccccc2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.