Using O=C1NCC12CCNCC2, O=Cc1cc2nc(Cl)nc(N3CCOCC3)c2s1 to produce O=C1NCC12CCN(Cc1cc3nc(Cl)nc(N4CCOCC4)c3s1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.