CCOc1ccc(-n2c(=O)c3c4c(sc3n(CC(=O)Nc3cccc(C(F)(F)F)c3)c2=O)CCCCC4)cc1
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?