CC(=O)Nc1ccc(S(=O)(=O)N2CCN(c3cc(C)nc4ncnn34)CC2)cc1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?