Using CCOC(=O)c1ccc(P(=O)(CP(=O)(OCC)OCC)OCC)cc1 to produce CCOP(=O)(CP(=O)(OCC)c1ccc(C(=O)O)cc1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.