Using O=C1CN(CCN2CCOCC2)c2nc(Br)cnc2N1, CC(C)(O)c1ccc([Sn](C)(C)C)cn1 to produce CC(C)(O)c1ccc(-c2cnc3c(n2)N(CCN2CCOCC2)CC(=O)N3)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.