CN(CCCNC(=O)c1n[nH]c2c1ccc1ccccc12)CCCNC(=O)c1n[nH]c2c1ccc1ccccc12
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?