Using CCOC(=O)c1cn2c3c([nH]c(=O)c2n1)-c1cccc(CP(=O)(OCC)OCC)c1C3 to produce O=C(O)c1cn2c3c([nH]c(=O)c2n1)-c1cccc(CP(=O)(O)O)c1C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.