Using CCc1ccc(C(O)c2cn3c(cc(OC)c4ccccc43)n2)cc1 to produce CCc1ccc(C(=O)c2cn3c(cc(OC)c4ccccc43)n2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.