Using O=S1CCN(c2nc(N3CCNCC3)nc3nc(NCc4ccccc4)c(Cl)nc23)CC1, CO to produce COc1nc2c(N3CCS(=O)CC3)nc(N3CCNCC3)nc2nc1NCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.