Using O=C1NCCC1Br, COc1ccc(-c2nnc3c4ccccc4c(O)nn23)cc1 to produce COc1ccc(-c2nnc3c4ccccc4c(OC4CCNC4=O)nn23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.