CN(C)CCNC(=O)c1ccc(Cl)c2c(Nc3ccc(S(N)(=O)=O)cc3)c3ccccc3nc12
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?