Using COC(=O)c1ccc(C(=O)N2Cc3ccc(C(=O)NCc4cccnc4)n3Cc3ccccc32)cc1 to produce O=C(O)c1ccc(C(=O)N2Cc3ccc(C(=O)NCc4cccnc4)n3Cc3ccccc32)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.