CCCC(=O)Nc1cc(/C=C/C(=O)N2C[C@H]3C[C@@]34C2=CC(=O)c2[nH]cc(C)c24)n(C)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?