C[C@@H](c1ccccc1)N(CC#N)[C@H]1CCC[C@]1(O)/C=C/c1ccc2c(c1)OCO2
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?