Using NCc1cccc(N)n1, O=C(CCC(=O)c1ccccc1)c1ccccc1 to produce Nc1cccc(Cn2c(-c3ccccc3)ccc2-c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.