Using CCOC(=O)CP(=O)(OCC)OCC, O=Cc1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl to produce CCOC(=O)/C=C/c1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.