Using CCc1nc2c(N)nc3cc(O)ccc3c2n1CC1CCOCC1, O=C(CBr)N1CCOCC1 to produce CCc1nc2c(N)nc3cc(OCC(=O)N4CCOCC4)ccc3c2n1CC1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.