Using COCCBr, Cc1c(Cl)cc(O)c2nc(CCc3nc(N4CCCC4)nn3C)nn12 to produce COCCOc1cc(Cl)c(C)n2nc(CCc3nc(N4CCCC4)nn3C)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.