Using CCOc1cc(Cc2cnc(N)nc2N)cc(OCC)c1-c1cccc(O)c1, COCCBr to produce CCOc1cc(Cc2cnc(N)nc2N)cc(OCC)c1-c1cccc(OCCOC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.