Using COC(=O)c1c[nH]c2cc(Cl)c(-c3ccc(OCCCN4CCOCC4=O)cc3)cc12 to produce O=C(O)c1c[nH]c2cc(Cl)c(-c3ccc(OCCCN4CCOCC4=O)cc3)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.