Using O=C(O)Cn1c(=O)c2cc(Cl)ccc2n(Cc2ccc(Cl)cc2Cl)c1=O, OCCBr to produce O=C(Cn1c(=O)c2cc(Cl)ccc2n(Cc2ccc(Cl)cc2Cl)c1=O)OCCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.