Using CCOC(=O)C1(NC(=O)c2ncc3c(=O)n(Cc4ccccc4)ccc3c2O)CC1 to produce O=C(NC1(C(=O)O)CC1)c1ncc2c(=O)n(Cc3ccccc3)ccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.