Using COC1(c2cc3nc(Cl)nc(N4CCOCC4)c3s2)CCNCC1, C=O to produce COC1(c2cc3ncnc(N4CCOCC4)c3s2)CCN(C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.