Using COC(=C1CC2CCC(C1)N2c1ncccn1)c1ccc(Br)cc1 to produce O=C(c1ccc(Br)cc1)C1CC2CCC(C1)N2c1ncccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.