Using CCCCOc1nc(N)c2nc(OC)n(CCCNCc3ccc(CC(=O)O)cc3)c2n1, CO to produce CCCCOc1nc(N)c2[nH]c(=O)n(CCCNCc3ccc(CC(=O)OC)cc3)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.