Using CC(C)(C)C(=O)OCI, COCc1ncn2cc(C3=C(C(=O)[O-])N4C(=O)[C@H]([C@@H](C)O)[C@H]4[C@H]3C)sc12 to produce COCc1ncn2cc(C3=C(C(=O)OCOC(=O)C(C)(C)C)N4C(=O)[C@H]([C@@H](C)O)[C@H]4[C@H]3C)sc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.