CCCCN1C(=O)Cc2c1nc(N)c1c(N)nc(N(CCC)CCC)c(C#N)c21
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?