Using COC(=O)c1cnc(Oc2ccc3c(c2)CCN(C2CCC2)CC3)cn1 to produce O=C(O)c1cnc(Oc2ccc3c(c2)CCN(C2CCC2)CC3)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.