Using CC(NC(=O)OC(C)(C)C)C(=O)O, CCOC(=O)C(N)C(C)=O to produce CCOC(=O)C(NC(=O)C(C)NC(=O)OC(C)(C)C)C(C)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.