Using CCOC=O, CC(=O)c1ccc(C(=O)Nc2ccc(C(=O)c3ccc4c(c3)NC(=O)C4)cc2)s1 to produce CC(=O)c1ccc(C(=O)Nc2ccc(C(=O)c3ccc4c(c3)NC(=O)C4=CO)cc2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.