Using CC(C)(C)OC(=O)NC1(C(=O)O)CC1, COC(=O)c1c(Cl)ccn1N to produce COC(=O)c1c(Cl)ccn1NC(=O)C1(NC(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.