C/C=C/OC(=O)NC(c1ccccc1)[C@]1(C(C)=O)CCCC1=O
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?