Using C1=C(N2CCN(c3ncccn3)CC2)CCc2cc3c(cc21)OCO3 to produce c1cnc(N2CCN(C3CCc4cc5c(cc4C3)OCO5)CC2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.