Using O=C(O)c1cnc(Cl)cn1, OC(COCc1ccccc1)COCc1ccccc1 to produce O=C(OC(COCc1ccccc1)COCc1ccccc1)c1cnc(Cl)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.