Using CC(=O)OC(C)=O, CCCCCN1C(=O)C(CCC(=O)OCC)(NC(=O)C2Cc3ccccc3CN2)c2ccccc21 to produce CCCCCN1C(=O)C(CCC(=O)OCC)(NC(=O)C2Cc3ccccc3CN2C=O)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.