Cc1ccc(NC(=O)c2c([N+](=O)[O-])c(C(C)(C)C)nn2C)c(C)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?