Using Nc1ccccn1, O=C(O)CC(c1ccccc1)N1Cc2ccccc2C1=O to produce O=C(CC(c1ccccc1)N1Cc2ccccc2C1=O)Nc1ccccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.