Using O=C1CN=C(c2ccccc2Cl)c2cc(F)c(F)cc2N1, CO to produce COc1cc2c(cc1F)C(c1ccccc1Cl)=NCC(=O)N2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.