Cc1ccccc1CN1CCCC(C(=O)Nc2ccc(-c3cc[nH]n3)cc2)C1
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?