Using COc1c(Br)cc(C(=O)N2CCOc3ncc(C4CC4)cc32)cc1Br to produce O=C(c1cc(Br)c(O)c(Br)c1)N1CCOc2ncc(C3CC3)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.