Using CCn1cc(CO)c(OCc2ccc(OCc3nc(-c4ccco4)oc3C)c(OC)c2)n1 to produce CCn1cc(C=O)c(OCc2ccc(OCc3nc(-c4ccco4)oc3C)c(OC)c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.