Using CCN1C(=O)Cc2cc(OCc3ccccc3C(=O)O)ccc21 to produce CCN1C(=O)Cc2cc3c(cc21)C(=O)c1ccccc1CO3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.