Using O=C1CC2CCC(C1)N2c1ncccn1, CCOP(=O)(OCC)C(OC)c1ccc(Br)cc1 to produce COC(=C1CC2CCC(C1)N2c1ncccn1)c1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.