Using COC(=O)c1ccc(-c2nc3ccc(O)c(C=O)c3[nH]2)cc1 to produce O=Cc1c(O)ccc2nc(-c3ccc(C(=O)O)cc3)[nH]c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.