Using N=C(NC(=O)OCc1ccccc1)NC(=O)OCc1ccccc1 to produce O=C(N=C(NC(=O)OCc1ccccc1)NC(=O)OCc1ccccc1)OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.