Using CCOc1ccc(Cc2cc(C(=O)CP(=O)(OCC)OCC)ccc2O)cc1 to produce CCOc1ccc(Cc2cc(C(=O)CP(=O)(O)O)ccc2O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.