Cc1cc(CNC(=O)CC2C(=O)NCCN2Cc2ccc(-c3ccccc3)cc2)nn1C
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?