CC1CN(C(=O)c2ccc(Cl)c(S(=O)(=O)NCc3ccco3)c2)CC(C)O1
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?