C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)C(=O)Cc2ccccc2)OCCCC[C@@H](C)Oc2ccc(NC(=O)Nc3ccc(F)cc3)cc2C1=O
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?