N#CC(C(=O)NC1CCCCC1)c1nc2ccccc2nc1N1CCC(C(N)=O)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?