Using CCCN(c1ccncc1)n1cc(C)c2cc(O)ccc21, O=C=NCc1ccccc1 to produce CCCN(c1ccncc1)n1cc(C)c2cc(OC(=O)NCc3ccccc3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.