Using O=c1[nH]c2ncc(Br)nc2n1CC1CCOCC1, CC(C)(C)OC(=O)c1nc2cc([Sn](C)(C)C)ccc2[nH]1 to produce O=c1[nH]c2ncc(-c3ccc4[nH]cnc4c3)nc2n1CC1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.