Using CC(C)(C)OC(=O)n1ccc2c(Br)ccnc21, C[Sn](C)(C)c1cnc2c(n1)N(CCC1CCOCC1)C(=O)CN2 to produce O=C1CNc2ncc(-c3ccnc4[nH]ccc34)nc2N1CCC1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.