Cc1n[nH]c(C)c1C(=O)CC1(O)C(=O)N(CCc2ccccc2)c2ccc(Cl)cc21
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?