Using COC(=O)CC12CCC(c3ccc(-c4ccc(Nc5nnc(C6CCC6)o5)cn4)cc3)(CC1)CO2 to produce O=C(O)CC12CCC(c3ccc(-c4ccc(Nc5nnc(C6CCC6)o5)cn4)cc3)(CC1)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.