Using CCCCC1c2nc(-c3ccccc3OC)cn2CCN1C(=O)CCc1cnc(C(=O)OC(C)(C)C)[nH]1 to produce CCCCC1c2nc(-c3ccccc3OC)cn2CCN1C(=O)CCc1cnc[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.