Using C=CCOC(=O)N(c1ccncc1)c1nc(-c2nn(C(=O)OC(C)(C)C)c3ccccc23)ncc1OC to produce C=CCOC(=O)N(c1ccncc1)c1nc(-c2n[nH]c3ccccc23)ncc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.