Using COc1cnc(-c2nnc(C)[nH]2)c2[nH]ccc12, COC(=O)C(=O)Cl to produce COC(=O)C(=O)c1c[nH]c2c(-c3nnc(C)[nH]3)ncc(OC)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.