CC(C)n1cc(CN2CCC(C(=O)Nc3cccc(-c4cccc(Cl)c4)c3)CC2)cn1
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?