Cc1ccc(C)c(N2CCN(S(=O)(=O)c3ccc(-c4ccc(O)nn4)o3)CC2)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?