CCN(CC)c1ccc(NC(=O)Cn2c(C(C)NC(=O)c3ccccc3)nc3ccccc32)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?