Using O=C1CN=C(c2cnc3ccccc3c2)c2ccccc2N1, C1CCOC1 to produce CN1C(=O)CN=C(c2cnc3ccccc3c2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.