Using COC(=O)C1=Cc2cc(-c3ccc(N4CCOCC4)cc3)ccc2N(C=O)CC1 to produce O=CN1CCC(C(=O)O)=Cc2cc(-c3ccc(N4CCOCC4)cc3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.