Using COc1ccc(NC(=O)C(=O)c2c3n(c4ccccc24)CCNCC3)cc1 to produce COc1ccc(NC(=O)Cc2c3n(c4ccccc24)CCNCC3)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.