Using COC(=O)c1ccc(CNc2nccc(NCCc3ccc(OC)c(OC)c3)n2)cc1 to produce COc1ccc(CCNc2ccnc(NCc3ccc(C(=O)O)cc3)n2)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.