Cc1ccc(Nc2nnc(-c3ccc(C)c(S(N)(=O)=O)c3)c3ccccc23)cc1
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?