Using COC(=O)c1ccc(C(=O)Nc2ccc(C(=O)N3CCCc4ccccc43)cc2)cc1 to produce O=C(O)c1ccc(C(=O)Nc2ccc(C(=O)N3CCCc4ccccc43)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.