Cc1cccc(C)c1NC(=O)NC1(C(=O)N2CCN3CCCC3C2)CCCCC1
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?