Using O=C(Cl)OCc1ccccc1, Clc1cc(Br)c2c(c1)NCCO2 to produce O=C(OCc1ccccc1)N1CCOc2c(Br)cc(Cl)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.