Using COC(=O)c1cc(OC)c2c(c1)N(C(=O)OC(C)(C)C)CC2 to produce COc1cc(C(=O)O)cc2c1CCN2C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.