Using CCCCN(CC)c1nc(C)nc2c1CC(=O)N2c1c(C)cc(C)cc1C, O=P(Cl)(Cl)Cl to produce CCCCN(CC)c1nc(C)nc2c1C(=O)C(=O)N2c1c(C)cc(C)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.