CCn1c2c(c(=O)n3ncc(C(=O)Nc4ccc(F)c(Cl)c4)c13)CN(Cc1ccc(OC)cc1)CC2
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?