Cc1cc(=O)c(C(=O)Nc2cccc(N3CCCC3=O)c2)nn1-c1ccccc1Cl
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?