Using O=C1CCC(=O)N1Br, Cn1ncc2cc(-c3ccc(N)cn3)ccc21 to produce Cn1ncc2cc(-c3ccc(N)c(Br)n3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.