C=C1CCN([C@H](C(=O)NCc2cc(OC)c(OC)c(OC)c2)C(C)C)S(=O)(=O)c2ccccc21
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?