Using C[O-], O=C1N(Cc2ccnc(Br)c2)CCCC12CCN(c1cnc3ccccc3n1)CC2 to produce COc1cc(CN2CCCC3(CCN(c4cnc5ccccc5n4)CC3)C2=O)ccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.