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