Using Nc1nc(Nc2ccc(Oc3ccnc(C(=O)O)c3)cc2)cc(-c2ccccc2)n1, C1COCCN1 to produce Nc1nc(Nc2ccc(Oc3ccnc(C(=O)N4CCOCC4)c3)cc2)cc(-c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.