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