CC(C)=CCC[C@@H](C)C1=C(O)C(O)C(C)=C2N=C(c3ccccc3)C(=O)OC21
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?