Using COC(OC)c1cc(OC(C)=O)c2c(c1)N1CC3C(N3C(C)=O)C(OC(C)=O)(O1)C2=O to produce CC(=O)Oc1cc(C=O)cc2c1C(=O)C1(OC(C)=O)ON2CC2NC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.