Using CCOC(=O)C1CCN(c2ncc3c(n2)N(NCc2ccc4c(c2)OCO4)CC=C3)CC1 to produce O=C(O)C1CCN(c2ncc3c(n2)N(NCc2ccc4c(c2)OCO4)CC=C3)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.