NC(=O)[C@@H]1CCCCNc2c(F)cc([N+](=O)[O-])cc2C(=O)N[C@@H](CC(=O)O)C(=O)NCC(=O)N1
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?