Using CCCC[O-], COC(=O)CN1C(=O)c2ccc(I)cc2C1=O to produce CCCCOC(=O)c1[nH]c(=O)c2cc(I)ccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.