Using C1COCCN1, O=C(Cl)c1nc(CCN2CCOCC2)n2ccccc12 to produce O=C(c1nc(CCN2CCOCC2)n2ccccc12)N1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.